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1. 发明专利

JPH06244026A SUPERCONDUCTIVE COIL APPARATUS 失效
公开(公告)号：JPH06244026A
公开(公告)日：1994-09-02
申请号：JP28469693
申请日：1993-11-15
申请人： TOKAI RYOKAKU TETSUDO KK , MITSUBISHI ELECTRIC CORP
发明人： TERAI MOTOAKI , SHINOBU MASATOSHI , JIZO YOSHIHIRO , OKI MASAO , AKAGI HIDENARI , IKESHITA KOJI , GOMI TAKESHI , KANO SEIJI , YAMAGUCHI TAKASHI , FUJIMOTO TAIJI , MIYAZAKI MASAYUKI , INOUE AKIO , TOMIZAWA MASAO , YAMADA TADATOSHI , MORITA MASAO , SENOO KAZUTAKE , NAKAMURA SHIRO
IPC分类号： H01F6/00 , H01F7/22
摘要： PURPOSE:To prevent frictional heat due to vibration from developing between a superconductive coil and an inner case by constructing the superconductive coil in such a way that the inner case is held only by the outer surface of the superconductive coil with a gap between the other three surfaces of the superconductive coil and the inner case. CONSTITUTION:A superconductive coil 1 having a rectangular cross section comprises an outer section 1a, side section 1b, and an inner section 1c, and an inner case 2 housing the superconductive coil 1 comprises an outer plate 2, a side plate 2b, and an inner plate 2c. A support member 10 interposed between the outer section 1a of the superconductive coil 1 and the outer plate 2a of the inner case 2 is fixed to the outer section 1a of the superconductive coil 1 with an adhesive or the like. In this construction, the superconductive coil 1 and the inner case 2 act as one unit by way of the outer plate 2a as a result of a force W in a radial direction generated at the time of excitation and a frictional force caused by the force. Accordingly, the generation of friction between the superconductive coil and the inner case is prevented and the cooling of the superconductive oil is facilitated.

2. 发明专利

JPH04271246A MOTOR 失效
公开(公告)号：JPH04271246A
公开(公告)日：1992-09-28
申请号：JP1320191
申请日：1991-02-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEKOSHI YUKINORI , SUZUKI KENJI , UKAI MAKOTO , HAYASHI YUKIO , TOMIZAWA MASAO
IPC分类号： H02K5/24
摘要： PURPOSE:To get a motor which prevents the abnormal sound arising from the resonance when the magnetic oscillation frequency occurring from a motor and the peculiar frequency of the equipment incorporated in the motor equals to each other. CONSTITUTION:A bearing 9 and a pressure spring 10 are housed in one of the housing 1 provided at the frame 2 of a motor 18. In the other housing 1, a ring-shaped vibration-proof washer 20 made of rubber is put between the frame 2 and the bearing 9.

3. 发明专利

JPH03264213A WIRE ELECTRIC DISCHARGE MACHINING DEVICE 失效
公开(公告)号：JPH03264213A
公开(公告)日：1991-11-25
申请号：JP6163590
申请日：1990-03-13
申请人： MITSUBISHI ELECTRIC CORP
发明人： MORISHITA HIROAKI , TERADA YUTAKA , TOMIZAWA MASAO , KIKUYAMA YOICHI
IPC分类号： B23H7/02 , B23H7/04 , B23H7/10
摘要： PURPOSE:To control the tension of a wire electrode in a high accuracy, by providing a command value correcting means which corrects the command value onto the tension tensing means of a command signal generating means based on the comparison result of a comparing means. CONSTITUTION:A tension tensing means 30 giving tension to a wire electrode 2, a command signal generating means 27 generating a traveling command and tension command to the wire electrode 2 and a speed detecting means 4 detecting the traveling speed of the wire electrode 2 are provided. The detection result of this speed detection means 5 and the traveling speed of the wire electrode 2 based on the command of a command signal generating means 26 are compared by a comparing means 33. Then, the command value onto the tension tensing means 30 of the command signal generating means 27 is corrected by a command value correction means 34 based on the comparison result of this comparing means 33.

4. 发明专利

JPH02152726A WIRE FEEDER FOR WIRE ELECTRO-DISCHARGE MACHINE 失效
公开(公告)号：JPH02152726A
公开(公告)日：1990-06-12
申请号：JP30569988
申请日：1988-12-02
申请人： MITSUBISHI ELECTRIC CORP
发明人： TOMIZAWA MASAO , KIKUYAMA YOICHI , MORISHITA HIROAKI
IPC分类号： B23H7/10
摘要： PURPOSE:To keep tension of a wire electrode in a specified state all the time as well as to machine a workpiece in a highly accurate manner by installing a control means which controls operation of a braking means from a tension detecting means according to a tension detecting signal of the wire electrode. CONSTITUTION:At the time of cutting operation of a workpiece, if static tension of a wire electrode 1 varies and a large tension variation occurs in this wire electrode 1 due to resonance with disturbance, a tension change or variation in this wire electrode 1 is detected by a tension detecting means 26 as displacement of a guide pulley 14. On the basis of this detection signal, operation of a braking means 8 is controlled via control means 28, 29, and tension of the wire electrode 1 is thus corrected. Accordingly, the wire electrode 1 is traveled to a machining position of the workpiece in a specified tension maintaining state at all times, so that highly accurate machining takes place.

5. 发明专利

JPS61172268A MAGNETIC HEAD SUPPORTING DEVICE OF FLOPPY DISK DRIVE 失效
公开(公告)号：JPS61172268A
公开(公告)日：1986-08-02
申请号：JP1381185
申请日：1985-01-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： TOMIZAWA MASAO , FUTAGAWA AKIMI , MASUDA TAKAHIRO , OKADA KATSUMI , KOJIMA TAIZO
IPC分类号： G11B17/32
摘要： PURPOSE:To improve the following-up capacity of a magnetic head and prevent flaws due to contacting between a magnetic head end face and a magnetic diskette by providing an undulation straightening head cover formed into a curved surface around the magnetic head. CONSTITUTION:A head cover 8 which straightens the undulation of a magnetic diskette 4 and is formed into a smooth curved surface is attached so as to cover a magnetic head 6. The difference of height between the cover 8 and the contacting surface of the head 6 is set in consideration of the constant of elasticity of a gimbals spring 5. A pressing force P applied to a head arm 2 by a pressing spring 7 causes deformation of the spring 5. The elastic restoring force of the spring 5 due to deformation fives a contacting force between the head 6 and the diskette 4. The rest of the pressing force P due to the spring 7 is transmitted to the diskette 4 through the cover 8. Thus, the following-up capacity of the magnetic head is improved. Further, flaws due to contacting between the magnetic head end face and the magnetic diskette are prevented.

6. 发明专利

JPS59161566A Vibration control apparatus 失效
公开(公告)号：JPS59161566A
公开(公告)日：1984-09-12
申请号：JP3684083
申请日：1983-03-07
申请人： Mitsubishi Electric Corp
发明人： TOMIZAWA MASAO
IPC分类号： E04H9/02 , F16F15/02

7. 发明专利

JPS58156605A VIBRATION CONTROL APPARATUS 失效
公开(公告)号：JPS58156605A
公开(公告)日：1983-09-17
申请号：JP3878482
申请日：1982-03-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： FURUISHI YOSHIO , TOMIZAWA MASAO , SUGANAMI TAKUYA
IPC分类号： E01F8/00 , E01D1/00 , E01D19/04

8. 发明专利

JP2533683B2 失效
公开(公告)号：JP2533683B2
公开(公告)日：1996-09-11
申请号：JP27522990
申请日：1990-10-16
申请人： MITSUBISHI ELECTRIC CORP
发明人： TOMIZAWA MASAO , KUBOTA TAKEHIKO
IPC分类号： B66B1/26 , B66B1/04 , B66B1/24 , B66B1/30

9. 发明专利

JPH02116421A WIRE ELECTRIC DISCHARGE MACHINE 失效
公开(公告)号：JPH02116421A
公开(公告)日：1990-05-01
申请号：JP26959288
申请日：1988-10-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIKUYAMA YOICHI , TOMIZAWA MASAO , MORISHITA HIROAKI
IPC分类号： B23H7/02
摘要： PURPOSE:To enhance the reliability of a device as well as to shorten the detecting time for wire disconnection with working accuracy improved by constituting the device to detect the disconnection of wire electrodes by use of rotating speed signal of either one of a bobbin, a brake pulley and the like provided for places more than one, and of a disconnection detecting circuit. CONSTITUTION:The rotating speeds of a bobbin, a brake pulley 4, a guide pulley 10 and the like are detected by speed detecting means 13 and 17 at all times. The rotating speed signals are converted into disconnection detecting signals by a disconnection detecting means 18. Then, when a wire electrode 1 is disconnected, the tension of the wire electrode 1 is thereby released so that the rotating speeds of the bobbin and the like are abruptly changed. And the disconnection of the wire electrodes 1 is therefore, detected by the disconnection detecting means 15 based on the change in the disconnection detecting signals accompanied with the change in the rotating speeds so that the operation of a wire electric discharge machine is thereby suspended.

10. 发明专利

JPS62208824A WIRE ELECTRIC DISCHARGE MACHINE WITH VIBRATION ABSORBING DEVICE 失效
公开(公告)号：JPS62208824A
公开(公告)日：1987-09-14
申请号：JP5043886
申请日：1986-03-10
申请人： MITSUBISHI ELECTRIC CORP
发明人： TOMIZAWA MASAO , SHINKAI MASARU , MORISHITA HIROAKI
IPC分类号： B23H7/02
摘要： PURPOSE:To prevent self-excited vibration and allow high-precision machining and high-speed machining via a high-pressure machining liquid by providing an elastomer having a spring and a damper and a vibration absorbing device made of a movable mass on a machining liquid feed nozzle supporting mechanism. CONSTITUTION:A vibration absorbing device 50, in which a movable mass 11 is connected to a frame 13 constituted of four flat plates via a cylindrical elastomer having a spring mechanism and a damper, is fixed to an arm 6 supporting a machining liquid feed nozzle 5 through a screw hole 15. When a fluid force is applied to the nozzle 5 during discharge machining, self-excited vibration is generated. However, the damping performance of the arm 6 is improved via the spring action and damping effect of the movable mass 11 and the elastomer 12, thus self-excited vibration due to the fluid exciting force is prevented. Accordingly, vibration can be prevented from occurring even if the pressure of the machining liquid is increased, thus high-speed machining can be performed without decreasing machining precision and deteriorating the machined surface.

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