JPS574806A - Noise preventor for steel pipe feeder - Google Patents

Noise preventor for steel pipe feeder

Info

Publication number
JPS574806A
JPS574806A JP7559780A JP7559780A JPS574806A JP S574806 A JPS574806 A JP S574806A JP 7559780 A JP7559780 A JP 7559780A JP 7559780 A JP7559780 A JP 7559780A JP S574806 A JPS574806 A JP S574806A
Authority
JP
Japan
Prior art keywords
inner cell
exciting coil
coil
rail
steel pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7559780A
Other languages
Japanese (ja)
Inventor
Katsutoshi Sato
Susumu Ito
Tadashi Kanetani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7559780A priority Critical patent/JPS574806A/en
Publication of JPS574806A publication Critical patent/JPS574806A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To simplify the constitution of a control circuit as well as reduce noise effectively by providing a positive exciting coil wound around each iron core inside inner cell portion including a skid rail and also reverse exciting coil wound jointly around the inner cell portion.
CONSTITUTION: On a magnetic rail 1 extending in the direction of turning of a steel pipe, a large number of inner cell iron cores 3 are provided in a row, and electric wires are wound around each iron core 3 to form a positive exciting coil 4. On these, an inner cell magnetic rail 5 is provided. The inner cell portion is wound with a reverse exciting coil 15 in a lump throughout its whole length, outer cell iron cores 6 are provided on the left and right sides of the inner cell iron core, and the outer cell rail 7 is provided in the face of the inner cell rail 5. when steel pipes are fed while turning, a control current consisting of a repetitive sequence of an exciting current of time T and a nonexciting current of time T2 (T1) is flowed in the positive exciting coil 4, while a low current is always flowed in the reverse exciting coil 15 reversely to the coil 14. When the coil 4 is in nonexciting state, residual magnetism in the steel pipe is erased by the coil 15.
COPYRIGHT: (C)1982,JPO&Japio
JP7559780A 1980-06-06 1980-06-06 Noise preventor for steel pipe feeder Pending JPS574806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7559780A JPS574806A (en) 1980-06-06 1980-06-06 Noise preventor for steel pipe feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7559780A JPS574806A (en) 1980-06-06 1980-06-06 Noise preventor for steel pipe feeder

Publications (1)

Publication Number Publication Date
JPS574806A true JPS574806A (en) 1982-01-11

Family

ID=13580764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7559780A Pending JPS574806A (en) 1980-06-06 1980-06-06 Noise preventor for steel pipe feeder

Country Status (1)

Country Link
JP (1) JPS574806A (en)

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