公开(公告)号：JP2004014241A

公开(公告)日：2004-01-15

申请号：JP2002164756

申请日：2002-06-05

Applicant: Shibafu Engineering Corp ,  Toshiba Corp ,  株式会社東芝 ,  芝府エンジニアリング株式会社

Inventor： OSHIMA IWAO ,  FUNABASHI TAKUMI ,  KAMIKAWAJI TORU ,  HONMA MITSUTAKA ,  NAKAGAWA SATOSHI ,  SHIMADA KAZUTO ,  ITO TOMOYASU ,  OKUTOMI ISAO

IPC: H01H33/59

Abstract: PROBLEM TO BE SOLVED: To provide a DC breaker which has a simple configuration, can be repeatedly used, has no limitation on applied voltage, and has no need for special composing elements. SOLUTION: A capacitor Cc1 to nonvibrationally commutate/break a direct current and a switch SW1 are parallelly connected. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2003092051A

公开(公告)日：2003-03-28

申请号：JP2001281201

申请日：2001-09-17

Applicant: TOSHIBA CORP

Inventor： SHIOIRI SATORU ,  KAMIKAWAJI TORU ,  SASAGE KOSUKE

IPC: H01H33/66 ,  H01H33/664

Abstract: PROBLEM TO BE SOLVED: To provide a switch device that suppresses the quantity of SF6 gas used, has a simple structure and high reliability, and uses a vacuum valve. SOLUTION: Metal members 31, 30, which have respectively a protruded part and a recessed part of which top ends are more protruded and more recessed than the movable contact 27 or the fixed contact 26, are supported by the movable electric conduction shaft 27 and the fixed electric conduction shaft 25, and they are provided so as to surround the movable contact 26 and the fixed contact 25 respectively, and the protruded part of the metal member 31 and the recessed part of the metal member 30 are arranged so as to be engaged each other at the position where the fixed contact 26 and the movable contact 27 contact each other. With this structure, a switch device having a vacuum valve that has excellent insulating performance, even if no-load switching is made, can be provided.

公开(公告)号：JP2000285773A

公开(公告)日：2000-10-13

申请号：JP9336499

申请日：1999-03-31

Applicant: TOSHIBA CORP

Inventor： SAKAI TADASHI ,  KAMIKAWAJI TORU ,  TSURUNAGA KAZUYUKI ,  ONO TOMIO ,  CHO TOSHI ,  NAKAYAMA KAZUYA

IPC: H01H33/66 ,  H01J19/24 ,  H01J21/08

Abstract: PROBLEM TO BE SOLVED: To improve delay in current interruption by arc in opening and the wear of the surface of an electrode for extending the service life by relatively arranging a first electrode and a second electrode contactable with and separable from the first electrode under reduced pressure, and forming a carbonaceous electron emitting film as the field electron emitting area on both the electrode surfaces. SOLUTION: A fixed electrode and a movable electrode contactable with and separable from it are arranged relatively under the reduced pressure of a vacuum casing, and a carbonaceous thin film that is a field electron emitting layer is formed on a part of both the electrode surfaces by plasma CVD method. As the carbonaceous thin film, a polycrystalline diamond layer reduced in resistance by boron dope to regulate the electron emitting threshold field to about 10 V/μm is used form the viewpoint of the durability to impact in current re- input. According to this, the current is replaced by the field emitting electron current accompanying opening of a pole, and when the electric field is reduced by the separation of the electrodes, the electron emission is quickly settled, and the current can be interrupted without waiting for the current zero point. Thus, generation of arc can be suppressed to extend the service life.

公开(公告)号：JPH10302586A

公开(公告)日：1998-11-13

申请号：JP10428497

申请日：1997-04-22

Applicant: TOSHIBA CORP

Inventor： KAMIKAWAJI TORU

IPC: H01H33/66

Abstract: PROBLEM TO BE SOLVED: To prevent drop in breaking characteristics caused by fine particles generating from an electrode breaking by arranging a trapping part for trapping fine particles generating by contact or separation of a moving side electrode with or from a fixed side electrode around the moving side electrode and the fixed side electrode. SOLUTION: A plurality of small holes 10a which are not passed through are formed on the inner surface of a part surrounding fixed side electrodes 5, 6 of a shield plate 10A. When current is switched, fine particles or projections are formed on the surface of a contact 8, but since the contact surface is almost vertical, the fine particles drop onto the bottom inner surface of the shield plate 10A by gravity. Floatation or movement of the fine particles which entered the small holes 10a during moving by being driven with an electric field between electrodes in the small holes 10a where electric field strength is made weak even when voltage is applied can be prevented. Increase in energy caused by repeated movements and collisions of the fine particles and an interaction with projections on the surface of the contact are suppressed, and dielectric breakdown caused by the fine particles is prevented.

公开(公告)号：JPH10233145A

公开(公告)日：1998-09-02

申请号：JP3208697

申请日：1997-02-17

Applicant: TOSHIBA CORP

Inventor： KAMIKAWAJI TORU

IPC: H01H33/66

Abstract: PROBLEM TO BE SOLVED: To provide a vacuum valve such that damage to contact surfaces caused by an arc generated at the input of power can be prevented and, even if it is damaged, a decrease in insulation characteristic can be prevented. SOLUTION: An approximately truncated-cone-shaped projection 12a is formed at the center of the contact surface of the contact 12 of an electrode on one side, and in the center of the contact surface of the contact 11 of an electrode on the other side, a recess 11a is formed into which the projection 12a is fitted when both of the contacts come into contact, with the top surface of the projection 12a making contact with the bottom surface of the recess 11a. The outer periphery of the top surface of the projection 12a is chamfered, and the outer periphery of the entrance of the recess 11a is also chamfered, so that an electric current is carried by way of the top surface of the projection 12a and the bottom surface of the recess 11a. For the contact material of the recess 11a, a material having a higher tensile strength than the contact material of the projection 12a is used, so that even if the contacts are fused together, the fused parts are allowed to remain in the recess 12a, preventing insulation characteristic from decreasing at the gap between the contacts when a circuit is broken and when it is made again.

公开(公告)号：JPH0612935A

公开(公告)日：1994-01-21

申请号：JP16886592

申请日：1992-06-26

Applicant: TOSHIBA CORP

Inventor： HIGASHINAKAGAHA EMIKO ,  TEJIMA KOICHI ,  KAMIKAWAJI TORU ,  OKUTOMI ISAO

IPC: H01H1/02

Abstract: PURPOSE:To provide a contact material capable of always exhibiting excellent contact resistance, fusing resistance, and consumption resistance even if a small gap between contacts may be selected and designed according to miniaturization of a device. CONSTITUTION:A contact material is made of two kinds or more of metals, which are not solid-soluble to each other or are small in solid solubility, i.e., at leant one kind selected from a group consisting of Ag, Cu, Au, Pt, Rh, and Ru and at least one kind selected from a group consisting of W, Mo, Cr, Fe, Ni, Te, Ag2Te, WC, and CdO, or a composite (inclusive of an alloy) made of one kind or more selected from the above metals and ceramic in an integrated state. A crystalline particle of at least one kind of metal of the composite metal is 8 or more of the particle size number (on the basis of JISCO551), and {100} face of at least one kind of metal is collected on the surface of the metal composite.

公开(公告)号：JP2006156272A

公开(公告)日：2006-06-15

申请号：JP2004348141

申请日：2004-12-01

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： KAMIKAWAJI TORU ,  FUNABASHI TAKUMI ,  OSABE KIYOSHI

IPC: H01H33/66

Abstract: PROBLEM TO BE SOLVED: To provide a vacuum switch capable of easily breaking a direct current.
SOLUTION: This vacuum switch is provided with: an insulating end plate 2 formed of an insulating material; a plurality of fixed-side contacts 5a, 5b, 5c and 5d fixed to one side surface of the insulating end plate 2; a plurality of movable-side contacts 7a, 7b, 7c and 7d mounted by facing to them; an operation rod 10 for connecting and disconnecting the plurality of movable-side contacts 7a, 7b, 7c and 7d to/from the plurality of fixed-side contacts 5a, 5b, 5c and 5d; and a vacuum vessel 3 airtightly fixed to the one side surface of the insulating end plate 2 by making airtightly movably piercing the operation rod 10 therein. The vacuum switch is characterized by that the fixed-side contacts 5a, 5b, 5c and 5d and the movable-side contacts 7a, 7b, 7c and 7d form a plurality of sets of pairs and electrically connected in series to each other.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种能够容易地断开直流电的真空开关。 解决方案：该真空开关设置有：由绝缘材料形成的绝缘端板2; 固定在绝缘端板2的一个侧表面上的多个固定侧触点5a，5b，5c和5d; 多个可动侧触点7a，7b，7c和7d，面对它们安装; 用于将多个可动侧触点7a，7b，7c和7d连接到多个固定侧触点5a，5b，5c和5d的操作杆10; 以及通过使操作杆10气密地移动地穿透绝缘端板2的一个侧表面而密封地固定的真空容器3。 真空开关的特征在于，固定侧触点5a，5b，5c，5d和可动侧触点7a，7b，7c，7d形成多组，并且彼此串联电连接。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2003077376A

公开(公告)日：2003-03-14

申请号：JP2001261478

申请日：2001-08-30

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： KAMIKAWAJI TORU ,  SATO JUNICHI ,  MIYAGAWA MASARU

IPC: H01H33/66 ,  H01H33/42

Abstract: PROBLEM TO BE SOLVED: To provide a compact power receiving and distributing device of an environment-conscious type of high reliability containing a vacuum switch by enhancing mechanical strength of an insulating operation rod making switching operation of a vacuum valve.
SOLUTION: With the insulating operation rod consisting of a metal rod 20, an insulating rod 15 and a metal rod 21 linked with an operation mechanism not shown, linked with a movable shaft 9 of a vacuum valve 1, the insulating rod 15 and the metal rods 20, 21 are linked by a plurality of thin metal cylinders 24. With the flexibility of the thin metal cylinders, residual stress due to difference in coefficient of thermal expansion on the brazed face between the insulating rod 15 and the thin metal cylinders 24 is relaxed. With this, the junction strength is reinforced and compared with the case where the insulating rod 15 and the metal rods 20, 21 are directly joined.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：通过提高真空阀的切换操作的绝缘操作杆的机械强度来提供包含真空开关的环境意识型高可靠性的紧凑型受电和分配装置。 解决方案：绝缘操作杆由金属杆20，绝缘杆15和与未图示的操作机构连接的金属杆21与真空阀1的可动轴9连接，绝缘杆15和金属 杆20,21通过多个薄金属圆筒24连接。由于薄金属圆柱体的灵活性，绝缘棒15和薄金属圆筒24之间的钎焊面上的热膨胀系数的差异导致的残余应力为 轻松。 由此，结合强度得到加强，与绝缘棒15和金属杆20,21的直接接合的情况相比较。

公开(公告)号：JP2000003647A

公开(公告)日：2000-01-07

申请号：JP16808898

申请日：1998-06-16

Applicant: TOSHIBA CORP

Inventor： SHIOIRI SATORU ,  KAMIKAWAJI TORU ,  SAKAI TADASHI ,  NAKAYAMA KAZUYA

IPC: H01H33/66 ,  H01J21/10

Abstract: PROBLEM TO BE SOLVED: To provide a power switch, usable for higher voltage, harmonized with the environment and excellent in safety and reliability. SOLUTION: An end plate 8A is brazed to an opening part on one side of an insulating cylinder 11A, an end plate 11B is brazed to an opening part on the other side thereof, and the interior is made vacuum. A positive electrode 3 made of copper material is put through and brazed to a middle part of the end plate 8A. A conduction shaft 1A is put through and brazed to a middle part of the end plate 8B on the other side. A pair of insulating tubes 9 is put through the end plate 8B at positions outside the conduction shaft 1A, and gate conduction shafts 7 are put through the insulating tubes 9. A gate electrode 4 is fixed to ends of the gate conduction shafts 7, and a plurality of acicular electrodes 2 are fixed to the conduction shaft 1A.

公开(公告)号：JPH07249352A

公开(公告)日：1995-09-26

申请号：JP3707394

申请日：1994-03-08

Applicant: TOSHIBA CORP

Inventor： KAMIKAWAJI TORU

IPC: H01H33/66

Abstract: PURPOSE:To provide a highly reliable vacuum circuit breaker that is excellent in breaking and current-carrying performance by suppressing magnetic field nonuniformities and temperature rises. CONSTITUTION:At least either the fixed or movable electrode of a vacuum circuit breaker has a flat main electrode 14 and an auxiliary electrode 15 having a hollow part 16. An outer peripheral part 15a surrounding the hollow part 16 is parted by an axial slit 21 provided along the direction of the axis of the electrode, and is also separated at its part not near the axial slit 21 by a perpendicular-to-axis slit 31 that is provided at almost the center of the end face of the hollow part 16 in such a way as to be perpendicular to the axis of the electrode. The end of the outer peripheral part 15a separated by the perpendicular-to-axis slit 31 is linked to a large-diameter part 15c or the main electrode 14 via a continuous peripheral part 15d or a connector 13, respectively. A current flowing in from below reaches a contact 9 through the parts 15b, 15c, 15d, 15a, 13, 14.