US 12,594,687 B2Granted

Lathe charger control device, lathe charger including the same, and a method for controlling a lathe charger

AssigneeMeinan Machinery Works, Inc.

InventorKeita Konishi

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Abstract

When the absolute value (|Tt−Tc|) of the difference between the turning time Tt of a log PW and the transport time Tc of the log PW is longer than a reference measurement time Ts, the turning-axis center line measurement time Tm is set to the absolute value (|Tt−Tc|) (Step S120), the rotation speed W of centering spindles 24a and 24b is set to a speed (Ws×Ts/Tm) lower than a reference rotation speed Ws, and also the measurement rotation angle α is set to an angle (αs×Ts/Tm) smaller than a reference measurement rotation angle as (Step S122). When the absolute value (|Tt−Tc|) is equal to or less than the reference measurement time Ts, the turning-axis center line measurement time Tm is set to the reference measurement time Ts (Step S116), the rotation speed W of the centering spindles 24a and 24b is set to the reference rotation speed Ws, and also the measurement rotation angle α is set to the reference measurement rotation angle αs (Step S118).

Claims10

Dependent claims

A lathe charger control device for controlling a lathe charger, the lathe charger including a measuring device for measuring an outer shape of a log and configured to transport logs to a veneer lathe, the lathe charger control device comprising:

a processor for calculating a turning-axis center line of each of the logs appropriate for turning the log, based on the outer shape of the log measured by the measuring device;
and
memory for storing a reference period of time required from a measurement of the outer shape to a calculation of the turning-axis center line of the log in order to measure the outer shape and calculate the turning-axis center line with a desired accuracy,
wherein the processor calculates a first period of time covering a turning time required from a start to a completion of turning a first log by the veneer lathe, based on the outer shape and the turning-axis center line of the first log, wherein the first log is, out of the logs, transported from the measuring device toward the veneer lathe;
outputs a control signal to the measuring device, when the first period of time is equal to or less than the reference period of time, so that from the measurement of the outer shape of a second log newly supplied to the measuring device to the calculation of the turning-axis center line of the second log is completed in the reference period of time;
and outputs a control signal to the measuring device, when the first period of time is longer than the reference period of time, so that from the measurement of the outer shape of the second log to the calculation of the turning-axis center line of the second log is completed in the first period of time.

3 more elements

A method for controlling a lathe charger, the lathe charger including a measuring device for measuring an outer shape of a log and configured to transport logs to a veneer lathe, the method comprising:

(a) storing a reference period of time required from a measuring of the outer shape of each of the logs to a calculation of a turning-axis center line of the log, so as to measure the outer shape and calculate the turning-axis center line appropriate for turning of the log with a desired accuracy;
(b) calculating a turning-axis center line appropriate for turning of the log, based on the outer shape of the log measured by the measuring device;
(c) calculating a first period of time that covers a turning time required from a start to a completion of turning a first log by the veneer lathe, based on the outer shape and the turning-axis center line of the first log, wherein the first log is, out of the logs, transported from the measuring device toward the veneer lathe;
and
(d) controlling the measuring device, when the first period of time is equal to or less than the reference period of time, so that from the measurement of the outer shape of a second log newly supplied to the measuring device to the calculation of the turning-axis center line of the second log is completed in the reference period of time, and controlling the measuring device, when the first period of time is longer than the reference period of time, so that the measurement of the outer shape of the second log and the calculation of the turning-axis center line of the second log is completed in the first period of time.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/995,562Filed 6 Apr 2020
Published: US 2023/0150167 A118 May 2023
Granted: 7 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B27L 5/022
Cutting strips from a rotating trunk or piece; Veneer lathes: devices for determining the axis of a trunk ; Loading devices for veneer lathes
B27L 5/02
Manufacture of veneer ; Preparatory processing therefor: cutting strips from a rotating trunk or piece; Veneer lathes
G01B 5/201
For measuring contours or curvatures: for measuring roundness
B27L
Removing bark or vestiges of branches