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1. 发明专利

JPH10252269A CONCRETE VIBRATOR 失效
公开(公告)号：JPH10252269A
公开(公告)日：1998-09-22
申请号：JP7652297
申请日：1997-03-11
申请人： SHINANO DENKI KK , MIKASA SANGYO KK
发明人： CHIKADA TAKUYA , SHIONOYA AKINOBU , KIMURA TOMOO , TANAKA GIICHI
IPC分类号： E04G21/08 , H02P6/06 , H02P6/08 , H02P6/17 , H02P6/18 , H02P6/182 , H02P6/21 , H02P6/28 , H02P21/04 , H02P21/05 , H02P21/18 , H02P21/22 , H02P21/24 , H02P21/34 , H02P23/03 , H02P23/04 , H02P23/16 , H02P23/20 , H02P27/06 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To make defoaming rapid and restrain component separation of concrete from being accelerated by providing a motor rotating speed control circuit with a voltage detecting circuit, and rotating a motor at a high speed in case of detected voltage being the specified value or more and at a low speed in case of the specified value or less. SOLUTION: Concrete is placed and when an operation signal e8 is inputted to a microcomputer 6 to drive a concrete vibrator, voltage e9 proportional to a current flowing from a current detecting resistance 3a of a three-phase inverter 3 to a transistor rapidly rises to the maximum value. This voltage e9 becomes higher than a threshold voltage e11 showing the maximum value, and a high level signal e12 is outputted from a speed command switching circuit 72 so as to rotate the concrete vibrator at high speed, thus imparting vibrational energy required for defoaming. When the bubble quantity remaining in concrete is reduced, the voltage e9 is lowered. When the voltage e9 becomes lower than the threshold voltage e11 , a low level signal e12 is outputted from the switching circuit 72 to rotate the motor at a low speed. Concrete can therefore be placed in a short time even by an inexperienced person.

2. 发明专利

JPH11222805A ADVANCING REVERSING OPERATION MECHANISM FOR VIBRATION COMPACTING MACHINE 失效
公开(公告)号：JPH11222805A
公开(公告)日：1999-08-17
申请号：JP3984698
申请日：1998-02-06
申请人： MIKASA SANGYO KK
发明人： TOGAMI TAKASHI , TANAKA GIICHI , MOCHIKI HIDEKI
IPC分类号： E01C19/22 , E01C19/34
摘要： PROBLEM TO BE SOLVED: To provide an advancing reversing operation mechanism to lighten an operation force for the advancing reversing switch shaft of a compacting machine. SOLUTION: By an oil pressure against a mechanical return force generated by rotation of an eccentric pendulum, the advancing reversing switch shaft of an exciting device 1 is axially moved and rotation of the pendulum is switched to an advancing reversing direction. In this case, a cylinder-form body 21 is provided at an interior with a piston 28, having one end side on which a mechanical return force is exerted from the direction of an advancing reversing switch shaft, and a sprue 29 interlocking with an operation lever 23 slidably inserted in the internal part on the other end side of the piston 28. A servo valve mechanism is provided to feed pressure oil, fed from a hydraulic pump 36 outside a body to the sprue 29, to the other end side of the piston 28 as a pressure against a mechanical return force from the direction of an advancing reversing switch shaft.

3. 发明专利

JPS6327671A CONCRETE VIBRATOR 失效
公开(公告)号：JPS6327671A
公开(公告)日：1988-02-05
申请号：JP17087186
申请日：1986-07-22
申请人： MIKASA SANGYO KK
发明人： TANAKA GIICHI
IPC分类号： E04G21/08

4. 发明专利

JPH02174533A COOLING MECHANISM FOR MOTOR 失效
公开(公告)号：JPH02174533A
公开(公告)日：1990-07-05
申请号：JP33019688
申请日：1988-12-27
申请人： MIKASA SANGYO KK
发明人： TANAKA GIICHI
IPC分类号： E02D3/046 , H02K5/20 , H02K9/06 , H02K9/26 , H02K9/28
摘要： PURPOSE:To improve cooling effect by sucking air through a suction port made at the upper section of a motor, by means of a fan arranged at a discharge port, and cooling the interior of the motor then deflecting the air flow along the centrifugal direction of the fan and discharging the air downwardly. CONSTITUTION:Air is filtered through an air-cleaner 13 arranged above a motor case 11 and fed through a suction port 12 into a motor case 11. Air is sucked through rotation of a fan 33 fixed to the shaft of a rotor 30 at horizontal side section of the motor case 11. Sucked air cools the surrounding section 21 of brush, the commutator section 22, the rotor 30 and the stator 31, then it is discharged through a discharge port 35. Air-flow path in the discharge port 35 is inclined along the centrifugal direction of fan so that the air is discharged downwardly. By such arrangement, discharged air is not sucked resulting in the improvement of cooling effect.

5. 发明专利

JP2002339313A FORWARD AND BACKWARD MOVEMENT SWITCHING DEVICE OF VIBRATION COMPACTION MACHINE 失效
公开(公告)号：JP2002339313A
公开(公告)日：2002-11-27
申请号：JP2001147296
申请日：2001-05-17
申请人： MIKASA SANGYO KK
发明人： TANAKA GIICHI , MOCHIKI HIDEKI , OKAYASU AKIYOSHI , HARASHIMA YOSHINORI
IPC分类号： E01C19/34 , B06B1/16
摘要： PROBLEM TO BE SOLVED: To provide a forward and backward movement switching device of a vibration compaction machine capable of preventing such a phenomenon causing a problem that a forward and backward movement switching shaft of a vibration exciter is suddenly pushed in the direction of the backward movement when a worker pushes a forward and backward movement lever from a forward movement to the position of the backward movement at one stretch in the case that a compaction of the ground is executed by the vibration compaction machine having the comparatively light weight body, since a phase of an eccentric pendulum is quickly made in the direction of the backward movement, the body is going to make the backward movement from the forward movement all at once to start the backward movement of a rolling compaction plate in a state of an attitude inclined backward and that the road surface is kicked up with the back end of the rolling compaction plate. SOLUTION: The forward and backward movement switching device is constituted of a cylindrical follower shaft 12 in the vibration exciter 3, a piston 21 for inserting the forward and backward movement switching shaft 4 inserted into a hydraulic cylinder 7 on a coaxial line with the follower shaft into the inside of the hydraulic cylinder 7, a basic shaft section 20 inside of the follower shaft 12 engaged with a spiral groove 18 of an interior wall of a follower gear boss 17 fitting both ends of a pin 24 projected to a direction at right angles to the direction of an axis to the circumference of the follower shaft 12 through a slot 19 provided along the direction of an axis of the follower shaft 12.

6. 发明专利

JP2002317405A FORWARD AND BACKWARD MOVEMENT SWITCHING HAND PUMP FOR VIBRATION COMPACTING MACHINE 失效
公开(公告)号：JP2002317405A
公开(公告)日：2002-10-31
申请号：JP2001121053
申请日：2001-04-19
申请人： MIKASA SANGYO KK
发明人： TANAKA GIICHI , MOCHIKI HIDEKI , OKAYASU AKIYOSHI , HARASHIMA YOSHINORI
IPC分类号： E01C19/34 , G05G1/04
摘要： PROBLEM TO BE SOLVED: To provide a forward and backward movement switching hand pump for vibration compacting machine capable of preventing a compacted roadbed to be kicked by the rear end of a compaction plate by allowing a body attitude to be inclined backward by the abrupt reverse rotation of an eccentric pendulum when the vibration starter of lightweight vibration compacting machine is switched from a forward to a backward movement by a forward and backward movement switching hand pump. SOLUTION: In this forward and backward movement switching hand pump 2 for feeding pressure oil for forward and backward movement switching to a hydraulic cylinder 23 installed at one end of the forward and backward movement switching shaft 17 of the vibration starter 4, a tubular guide 45 projectedly installed so as to communicate with the cylinder 27, an auxiliary piston 28 pushed out in the direction of the tip of a body along the outer peripheral surface of the tubular guide 45 by receiving a hydruaul pressure force in the direction of a main piston 28 inside the cylinder 27, and a spring 49 disposed between the auxiliary piston 28 and the tip pat of the body are installed at the tip of the cylinder.

7. 发明专利

JP2001131907A VIBRATION COMPACTING EQUIPMENT 失效
公开(公告)号：JP2001131907A
公开(公告)日：2001-05-15
申请号：JP31269499
申请日：1999-11-02
申请人： MIKASA SANGYO KK
发明人： TANAKA GIICHI , MOCHIKI HIDEKI , HARASHIMA YOSHINORI
IPC分类号： E01C19/34
摘要： PROBLEM TO BE SOLVED: To provide vibration compacting equipment for allowing hydraulic valve mechanisms to give forwarding and backwarding functions to the right and left sides of a body and thus making the body freely travel in the direction of 360 degrees by using hydraulic valve mechanisms for freely varying the rotating angle of right and left driven axis pendulums to a driving axis eccentric pendulum of a vibrator and operating a lever longitudinally, crosswise, and slantly. SOLUTION: Right and left power boosters 24a, 24b and right and left electromagnetic solenoids 29a, 29b for switching spool valves 28 for these power boosters are provided as external pressure supply devices for varying the rotating angles of right and left driven axis pendulums 6a, 6b to a driving axis eccentric pendulum for a vibrator 1. Electric resistance values obtained by inclining a lever 34 of a moving direction control device in the directions of 360 degrees is converted into voltage or current variation by an electronic control device 32 for actuating the electromagnetic solenoids in accordance with the current variation whereby pressure oil required for varying the rotating angle of the right and left driven axis pendulums for the vibrator is supplied from the power boosters.

8. 发明专利

JPH1028390A DRIVER OF APPARATUS 失效
公开(公告)号：JPH1028390A
公开(公告)日：1998-01-27
申请号：JP17763196
申请日：1996-07-08
申请人： MIKASA SANGYO KK , JPE KK
发明人： TANAKA GIICHI , IWASAKI TETSUJI , AKAO YOSHIAKI , TANAKA TOMOYUKI
IPC分类号： E04G21/06 , H02M7/48 , H02P1/26 , H02P5/74 , H02P27/06 , H02P7/63 , H02P7/74
摘要： PROBLEM TO BE SOLVED: To suppress the input current of the inverter of the driver of an apparatus within a certain range, for avoiding the adverse influence upon the power supply side, regradless of the load state of the inverter and the existence of the input voltage fluctuation, and further, improve the starting characteristics of a drive induction motor. SOLUTION: A driver starts a plurality of induction motors 6 by one inverter 3. An input current detector 9 which detects the input current of the inverter 3, an input current limit value setting device 8 which sets the limit value of the input current, an output-frequency setting device 4 which sets the output frequency of the inverter 3 and a frequency-adjusting device 10 which compares the input current value, detected by the input current detector 9 with the input current limit value set by the input current-limit setting device 8 and adjusts the frequency, set by the output frequency setting device 4. If the input current value exceeds the input current limit value, set by the input current limit-value setting device 8, the increase in the input current can be suppressed.

9. 发明专利

JPH09291703A CONCRETE VIBRATOR 失效
公开(公告)号：JPH09291703A
公开(公告)日：1997-11-11
申请号：JP12929296
申请日：1996-04-26
申请人： MIKASA SANGYO KK
发明人： TANAKA GIICHI , IWASAKI TETSUJI
IPC分类号： E04G21/08 , B06B1/16
摘要： PROBLEM TO BE SOLVED: To prevent failure by providing a rough surface area to facilitate air dispersion on the outer periphery of both ends of a rotor positioned in the inside of the stator coil end of a motor installed in a vibration cylinder. SOLUTION: A concrete vibrator is composed of a metallic vibration cylinder 1, a motor 4 and an eccentric pendulum 7. Then, a number of copper bars 12 nearly equal in length to the length of a stator 8 are buried in parallel at specified intervals in the outer peripheral surface of the rotor 9 of the motor 4 corresponding to the inside of the stator 8. In this case, recessed and projecting parts for air dispersion are provided in both end parts 9a and 9b of the rotor 9 in a position corresponding to the inside of a stator coil end 10. Air brought into contact with both end surfaces of the rotor 9 during its rotation is dispersed by a fan effect and the coil end 10 is cooled. Instead, a number of recessed grooves of the rotor longitudinal direction are provided in the outer peripheral surface of the rotor 9 or the rotary axis outer peripheral surface of the pendulum 7. Thus, the temperature increase of the coil end is prevented, a temperature in the vibrator is made uniform and the damaging of the motor is prevented.

10. 发明专利

JP2000017607A ADVANCE/RETREAT CHANGEOVER HAND PUMP FOR VIBRATION COMPACTOR 失效
公开(公告)号：JP2000017607A
公开(公告)日：2000-01-18
申请号：JP20108298
申请日：1998-07-02
申请人： MIKASA SANGYO KK
发明人： TANAKA GIICHI , MOCHIKI HIDEKI
IPC分类号： E01C19/34
摘要： PROBLEM TO BE SOLVED: To provide an advance/retreat changeover hand pump for a vibration compactor in which changeover operation to move back and forth a machine body by transferring the rotation of one pendulum in an oscillator for the vibration compactor can be performed by a light operation force in a compact and simple structure. SOLUTION: This hand pump is provided with a piston 28 receiving a mechanical return hydraulic pressure from a hydraulic cylinder 23 direction of an oscillator device 4 through a cylinder 27 on the back face, and a rod 30 provided with a ball valve 38 inserted in the piston, in the body 25 of an advance/retreat changeover hand pump 20 connected to the hydraulic cylinder 23 equipped at one of an advance/retreat changeover shaft 17 in the oscillator device 4 through a hydraulicoil passage. Further it is provided with a rotary shaft 31 of an advance/retreat lever 29 in an oil chamber 25a of the front end of the body at the opposite side of the piston and a cam 32 coming into contact with the front end of the rod 30 in the rotary shaft 31.

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