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Patent Searching and Data


Title:
ROD CHUCK OF PENETRATION TESTING MACHINE
Document Type and Number:
Japanese Patent JP2005002731
Kind Code:
A
Abstract:

To provide a rod chuck of a penetration testing machine having high strength and maintenability.

This rod chuck is constituted to hold a penetration rod 6 by engaging a steel ball 42 with a long groove 6a of this rod 6, by inserting the rod 6 into an inner hole 41a of a chuck shaft 41. A sleeve 46 supports the steel ball 42 in a state of projecting in the inner hole 41a, and is energized to the shaft end side of the chuck shaft 41, and brought into contact with a sleeve presser 47. This sleeve presser 47 is constituted for locking this pin by an elastic ring 47d, by inserting an engaging pin 47c into a cross-sectional circular engaging hole 47b dividedly formed into the chuck shaft 41 and a presser body 47a. The chuck shaft 41 is composed of one member, and the steel ball 42 is arranged on one end side, and the other end side extends by being inserted into bearings 43a to 43d in a uniform outer diameter, and is connected to a chuck rotatingly driving means.


Inventors:
KUMANAKA TADAO
HATANO NAOYA
Application Number:
JP2003169682A
Publication Date:
January 06, 2005
Filing Date:
June 13, 2003
Export Citation:
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Assignee:
NITTO SEIKO KK
International Classes:
E02D1/02; (IPC1-7): E02D1/02