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1. 发明专利

JPH07158066A WORK DISPLAY MONITOR FOR PILE DRIVER 失效
公开(公告)号：JPH07158066A
公开(公告)日：1995-06-20
申请号：JP31221793
申请日：1993-12-13
申请人： HITACHI CONSTRUCTION MACHINERY , MUTOU KOMUTEN KK
发明人： SAITO TAKEO , MUTOU YOSHINORI
IPC分类号： E02D7/00
摘要： PURPOSE:To provide the work display monitor of a pile driver useful for the selection and operation confirmation of the control lever or switches of a winch or the like. CONSTITUTION:Pressure switches 17a, 17b and the like laid in the pilot pipe lines 13a and 13b, for example, of a control valve 14 for selecting and controlling the operation of a winch are used to detect whether or not a lower travel body, an upper turning body and a plurality of winches are operating. Also, a display member 20 for showing the result of the detection is provided in an operator cab, thereby informing an operator of whether any of the lower travel body, the turning body and a plurality of winches is currently operating for a specific control lever or a switch.

2. 发明专利

JPH05301696A 失效
公开(公告)号：JPH05301696A
公开(公告)日：1993-11-16
申请号：JP12995292
申请日：1992-04-23
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： B66D1/44
摘要： PURPOSE:To provide a hydraulic winch control circuit capable of performing the stable ultra-low speed control of a hydraulic winch. CONSTITUTION:An ultra-low speed control circuit for a hydraulic winch is provided with a hydraulic motor 2 for rotating a winch 1, a hydraulic pump 4 with a regulator 4a, a pressure reducing valve 9 for regulating the command pressure to the regulator 4a, and a selective change-over valve 10 for normal control/low speed change-over. A bypass duct 12b is connected to a tank 11 from at least the lowering side duct 3b of the hydraulic motor 2, and a variable throttle valve 13b is provided in this by-pass duct 12. When the change-over to ultra-low speed is performed by the selective change-over valve 10 and the command pressure to the regulator 4a is regulated low by the pressure reducing valve 9, the discharge of the hydraulic pump 4 is reduced, so that the hydraulic motor is rotated at crawling speed, and the hydraulic winch 1 is driven at crawling speed. The pressure oil from the hydraulic pump 4 partially flows to the by-pass duct 12b and further flows to the tank 11 through a throttle valve 13b, and the winch 1 is driven at ultra-low speed slower than the crawling speed.

3. 发明专利

JPH04302615A HYDRAULIC CYLINDER FOR TILTING LEADER OF PILE DRIVER BACK 失效
公开(公告)号：JPH04302615A
公开(公告)日：1992-10-26
申请号：JP8989191
申请日：1991-03-28
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： E02D7/16
摘要： PURPOSE:To improve rigidity of an installation part of a head cover provided with projected parts to engage with recessed parts of a slide bracket, raise installation positioning precision of the projected parts and prevent oil leakage. CONSTITUTION:A flange 4 is welded on the upper end of a cylinder tube 1a of a hydraulic cylinder 1 on the back face of a leader 33. A first head cover 6 is installed on the flange 4 with a bolt 9. A second head cover 7 is connected to the first head cover 6 through a recession-projection combined surface and installed with a bolt 11. A projected part 2 to engage with a recessed part 35 of a slide bracket is formed on the upper part of the first head cover 7. A knock-pin 13 is inserted through the flange 4, the first and second head covers 6, 7. A pressure proof seal 14 and a bearing 15 are provided in the inner periphery of the first head cover 6, and the slide bearing 15 and a dust seal 16 are provided in the inner periphery of the second head cover 7.

4. 发明专利

JPS6139448B2 失效
公开(公告)号：JPS6139448B2
公开(公告)日：1986-09-04
申请号：JP8484482
申请日：1982-05-21
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： E02D7/16

5. 发明专利

JPS5830967B2 失效
公开(公告)号：JPS5830967B2
公开(公告)日：1983-07-02
申请号：JP8831079
申请日：1979-07-13
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： E02D7/16

6. 发明专利

JPH083996A LEADER FOR PILE DRIVING MACHINE 失效
公开(公告)号：JPH083996A
公开(公告)日：1996-01-09
申请号：JP16623894
申请日：1994-06-24
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： E02D7/16
摘要： PURPOSE:To improve work efficiency by a method wherein an exclusive leader of the different type is not required and work devices of various kinds can be mounted by means of one leader, so that the range of uses can be expanded, and the ability of a large pile driving machine can be produced efficiently. CONSTITUTION:Two sets of guide members 4a, 8 for mounting a work device are provided along a longitudinal direction of a leader 2 and mounting parts 5a, 6a for pile driving work devices 5, 6 are mounted to the guide members 4a, 8 in a vertically movable manner. Amounting base 7 for the guide members is provided on the face of at least one of the guide members 4a, 8 of the leader 2. The guide members 8 of various kinds can be mounted to the base 7 so as to be replaced corresponding to the mounting part 6a of the work device 6 of various kinds, wherein at least one of size, shape, or construction of the part 6a is different.

7. 发明专利

JPH07310320A LADDER STRUCTURE OF LEADER FOR PILING MACHINE 失效
公开(公告)号：JPH07310320A
公开(公告)日：1995-11-28
申请号：JP10535894
申请日：1994-05-19
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： E02D7/16
摘要： PURPOSE:To provide a sufficient vibration proof strength without intricate fitting structures and other obstacles and prevent the ladder and the fitting parts from easily deforming or breaking even if obstacles collide with the ladder on disassembling, assembling or transporting. CONSTITUTION:One end of a fitting member 14 is welded at the external wall of a leader 4 and the other end thereof are welded with respective vertical members 12 of a pair of handrails. A reinforcing plate 19 is arranged at a zone surrounded by a pair of handrail vertical members 12, lateral members 13 for a step, the fitting member 14, and the external wall of the leader 4. A grip space 20 is left between the reinforcing member 19 and the step lateral member 13 and a piping space 21 is left at a part of the space from the external wall of the leader 4 and the external periphery are welded with the vertical members 12 of a pair of handrails, the step lateral member 13, the fitting member 14, and the external wall of leader 4 respectively.

8. 发明专利

JPH07180149A SUPPORT MOUNTING MEMBER BRACING DEVICE OF ROTARY LEADER 失效
公开(公告)号：JPH07180149A
公开(公告)日：1995-07-18
申请号：JP34669993
申请日：1993-12-22
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： E02D7/16
摘要： PURPOSE:To provide such a support mounting member bracing device that width controlling work is easily carried out and that construction is simplified at a low cost when the lateral width of a stopper mechanism is changed with the variations of the intervals between the upper ends of supports due to the change of the length of a leader in order to prevent the distortion of the supports with the turning of the upper leader in the support mounting member bracing device held between the upper ends of both right and left supports. CONSTITUTION:A stopper mechanism is provided to either a member used between the upper ends of both right and left supports or the inside of the upper end of the support facing to the member, and a stopper receiving face is provided to the other. The stopper mechanism is constituted of a projection 32 or a recess, a stopper holder 30 and a stopper 31 provided to the stopper holder 30 in such a way that the holder is rotatable and the width of projection is adjustable. A plurality of recessed contact faces or projected contact faces different in depth of a flange 31a of the stopper 31 are selected to contact the projection 32 or recess to control the projected width. Part of the stopper 31 can contact one of the projection 32 or recess different in height.

9. 发明专利

JPH07138994A DISPLAY MONITOR FOR WORK OF CONSTRUCTION EQUIPMENT 失效
公开(公告)号：JPH07138994A
公开(公告)日：1995-05-30
申请号：JP28492993
申请日：1993-11-15
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO
IPC分类号： E02F9/26 , G07C5/00 , G09F9/00
摘要： PURPOSE:To provide a display monitor for work of a construction equipment available to the selection of a control lever and switches for a working machine and the confirmation of the operation of the working machine. CONSTITUTION:In a construction equipment with a plurality of working machines, whether or not a plurality of the working machines are operated respectively is detected by pressure switches 17a, 17b installed to pilot pipelines 13a, 13b for a control valve 14 changing over and controlling the operation of the working machines. A display member 20 displaying the result of the detection of the pressure switches 17a, 17b at every working machine is mounted in a driver's cab, and an operator is informed of the currently operated working machine.

10. 发明专利

JPH0144850B2 失效
公开(公告)号：JPH0144850B2
公开(公告)日：1989-09-29
申请号：JP12863680
申请日：1980-09-18
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SAITO TAKEO , HARA SEIICHIRO , AZEGAMI MAKOTO , OOCHI MINORU , TSUNABUCHI MASAKI
IPC分类号： E02D7/10 , F15B11/00

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