CONDUCTION CUTOFF DEVICE

• Main Authors: FUKUYAMA TAKEKI, NAKAMURA YOSHINOBU, HORI KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 16.03.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRIC SWITCHES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; EMERGENCY PROTECTIVE DEVICES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; RELAYS; SELECTORS; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To improve arc attenuation effects in a conduction cutoff device which cuts a part to be cut at two places.SOLUTION: A conduction cutoff device C comprises: a conductor including a part 22 to be cut in a long plate shape in a portion; an arc extinguishing chamber 32 including a pair of stationary blades 37; a gas generator; and a cutting member 50 including a pair of movable blades 57 for cutting the part 22 to be cut cooperatively with the stationary blades 37. In the part 22 to be cut, a separation piece 23 which is separated by cutting at two places and a main body part 24 which remains without being separated, are formed. An arc generated between cut ends 23a and 23b of the separation piece 23 and cut ends 24a and 24b of the main body part 24 is attenuated by the arc extinguishing chamber 32. A deformation mechanism 60 is provided for deforming the separation piece 23 pushed into the arc extinguishing chamber 32 by the cutting member 50 in such a manner that both the cut ends 23a and 23b are positioned forwards in a direction of movement of the cutting member 50 rather than at least places neighboring to the cut ends 23a and 23b between both the cut ends 23a and 23b in the separation piece 23.SELECTED DRAWING: Figure 6 【課題】被切断部を２箇所で切断する導通遮断装置におけるアーク減衰効果を高める。【解決手段】導通遮断装置Ｃは、一部に長尺板状の被切断部２２を有する導電体と、一対の固定刃３７を有する消弧室３２と、ガス発生器と、上記固定刃３７と協働して被切断部２２を切断する一対の可動刃５７を有する切断部材５０とを備える。上記被切断部２２には、２箇所での切断により分離した分離片２３と、分離されず残った本体部２４とが形成される。分離片２３の切断端２３ａ，２３ｂと本体部２４の切断端２４ａ，２４ｂとの間で生ずるアークが消弧室３２で減衰される。切断部材５０により消弧室３２内に押し込まれた分離片２３を、その両切断端２３ａ，２３ｂが、同分離片２３における両切断端２３ａ，２３ｂ間のうち、少なくとも同切断端２３ａ，２３ｂに隣接する箇所よりも切断部材５０の移動方向前方に位置するように変形させる変形機構６０が設けられている。【選択図】図６