EXPANSION OF PENSTOCK

Title:

EXPANSION OF PENSTOCK

Document Type and Number:

Japanese Patent JPS5933040

Kind Code:

A

Abstract:

PURPOSE: To reduce scratches on inner peripheral face generated at the time of expansion by further expanding the end of a penstock expanded by a rubber expanding mechanism by an expander mechanism.

CONSTITUTION: For instance, seal rubber 6, flare rubber 4 and seal rubber 5 are arranged around a shaft 7 in this order, and a rubber expanding mechanism in which a ring 8 is fixed with a bolt 9 is provided at the tip. This rubber expanding mechanism is placed at the inside of expanded part of a penstock 1, and a die 3 is placed at the inside of it. The shaft 7 is moved and the rubber 4 is compressed through the ring 8, and the penstock 1 is expanded by applying internal pressure. Then, insufficiently expanded end of expanded part is expanded by the expander. By this way, it becomes not necessary to cut and remove the end of the penstock 1 after expansion, and scratches on inner peripheral face generated at the time of expansion is reduced.

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INDUSTRIAL APPLICABILITY: A method of connecting at least one member provided on a shaft so as not to rotate relative to the shaft, and an apparatus for this purpose.

Inventors:

MICHISHITA HIDENORI
OGUCHI ISAO
SUZUKI KENICHI
KOGA KAZUO
SHIMAGUCHI TAKASHI
YAMAKI KAZUYUKI

Application Number:

JP14322582A

Publication Date:

February 22, 1984

Filing Date:

August 20, 1982

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