Rotary veneer lathe
AssigneeMeinan Machinery Works, Inc.
InventorsTsuyoshi Nakamura, Kazuya Kawai
Life of this patent
Estimating the term…
Abstract
A centerless rotary veneer lathe comprises a slidable backup device which is disposed on the opposite side of a peeler log from a knife carriage of the lathe. The backup device has a pair rotatable rolls located one above the other with the axes thereof extending in parallel to the axis of the log. The paired rolls are disposed such that the axes of such two rolls are spaced at substantially the same distance from an imaginary line extending perpendicularly to the axis of the log and in parallel to the direction in which the backup device is moved. In operation of the veneer lathe with the rolls set in contact with the log periphery, the knife carriage and the backup device are moved synchronously at such a variable controlled rate that causes peeling of veneer with a predetermined thickness.
Claims29
A rotary veneer lathe for peeling wood veneer from a log comprising:
- a pair of rotatable spindles for supporting and driving the log at the opposite ends thereof, said spindles being retractable from the log ends in the middle of veneer peeling operation of the lathe;
- a slidable knife carriage carrying a veneer peeling knife having a cutting edge at the tip end thereof;
- means for moving said knife carriage toward the axial center of the log;
- a peripheral drive engageable with the log peripheral surface adjacent the cutting edge of said knife for rotating the log;
- a slidable backup device disposed on the opposite side of the log from said knife carriage and having a pair of rotatable rolls carried by said backup device for movement therewith and located one above the other with the axes thereof extending parallel to the axis of the log;
- means for moving said backup device linearly so as to bring said paired rolls into engagement with the log peripheral surface and thereafter to move the rolls in engagement with the log periphery toward said knife carriage, said rolls being disposed such that the axes of said pair of rolls are spaced at substantially the same distance from an imaginary line extending perpendicularly to the axis of the log and in parallel to the direction in which said backup device is moved;
- and
- control means operable to control the operation of said respective means for moving the knife carriage and the backup device such that said knife carriage and said backup device are moved synchronously at a variable rate which causes peeling of veneer with a predetermined thickness.
A rotary veneer lathe for peeling wood veneer from a log comprising:
- a slidable knife carriage carrying a veneer peeling knife having a cutting edge at the tip end thereof;
- means for moving said knife carriage toward the axial center of the log;
- a peripheral drive engageable with the log periphery adjacent the cutting edge of said knife for rotating the log:
- a slidable backup device disposed on the opposite side of the log from said knife carriage and movable along a line which is oblique with respect to the horizontal, said backup device having a pair of rotatable rolls carried by said backup device for movement therewith and located one above the other with the axes thereof extending parallel to the axis of the log;
- means for moving said backup device linearly so as to move the rolls toward said knife carriage, said oblique line along which said backup device is moved is directed such that said backup device is moved upward gradually while moving toward said knife carriage, said rolls being disposed such that the axes of said pair of rolls are spaced at substantially the same distance from an imaginary line extending perpendicularly to the axis of the log and parallel to the direction in which said backup device is moved;
- and
- control means operable to control the operation of said respective means for moving the knife carriage and the backup device such that said knife carriage and said backup device are moved synchronously at a variable rate which causes peeling of veneer with a predetermined thickness.
Dependencies are inferred from the claim text.