JPS58112703A - Automatic centering device for material wood - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the Invention) The present invention is directed to the optimum centering position of the log set on the horizontal line of the spindle center, which is performed before chucking the log to the spindle center of the veneer race. This relates to an automatic centering device for logs that accurately aligns the centering position, and its purpose is to The woodcut is filmed by two television cameras, the images are overlapped on one CRT, and the diameter of the concentric circle within the outer periphery of the overlapped part of the image is maximized using the concentric circle diagram attached to the mask. A device has been proposed in which the cylinder of the supporting arm is controlled vertically and horizontally by manual operation to align the center of the log with the spindle center of the veneer lace. Since the complicated operations of moving logs back and forth from side to side are all performed by workers, there is a drawback that high-speed response is lacking and accuracy cannot be expected.

In addition, in the case of the automatic centering device for raw wood, which was previously filed in Japanese Patent Application No. 56-187167, all operations are automated, but the detection of the optimal centering position of the raw wood is performed exclusively in the axial direction. Measures have been taken to detect the ups and downs of the outside diameter using photoelectric switches or laser sensors placed on the outside, but this type of device does not detect the shape of the face of the log, and does not detect the outside diameter of the log. The detection of the ups and downs of the diameter also had the disadvantage of requiring intervention in the blind spot, making it impossible to expect accuracy.This device has been improved to eliminate these disadvantages of the conventional device.

(Structure of the Invention) The first aspect of the present invention is that the face ends 2a, 2b of the log 2 that has been placed on the lifting platform 1a, 1b and has arrived at the centering place directly above the
Area-type integrated photoelectric sensors 3a and 3b, which are called area sensors, each having a large number of light-receiving elements arranged in a grid-like pattern, and the area-type integrated photoelectric sensor 5.
The optimum centering position of the log 2 is calculated by inputting the detection signals of a and 3b, and the X of the lifting platforms 1a and 1b is calculated based on the output.
This is an automatic centering device for logs, which is composed of wheel actuating mechanisms 4a, 4'b, Y-wheel actuating mechanism 5a, and a computer 6 that controls each sbv separately.

Further, the second aspect of the present invention is a run in which a large number of light receiving elements are arranged in a straight line for detecting the undulations in the axial direction of the log 2 which is placed on the lifting platforms 1a and 1b and has arrived at the centering position directly above. Linear integrated photoelectric sensor 7a, also called sensor
, 7b, zone-type integrated photoelectric sensors 3a, 3b for individually detecting the shape of the face end 2a @ 21) of the log 2, the linear integrated photoelectric sensor 7a*7b, and zone-type integrated photoelectric sensors 3a, 3b. The optimum centering position of the log 2 is calculated by inputting the detection signal of
This is an automatic log centering device consisting of a computer 6 that separately controls the Y-wheel operating mechanisms 5a and 5'b.

That is, as shown in the figure, one example of the present invention is that the logs 9 carried in from the previous storage area by the conveyor 8 are placed on the lifting tables 1a and 1b, and attached to the lifting tables 1a and 1b. Lifting members 10 such as hydraulic cylinders and screws
A Y-wheel operating mechanism 5a including a servomotor 11 for driving the servomotor 11 in the Y-axis direction or an alternative hydraulic pump and hydraulic pulp, and a rotary transducer 12 for position detection.
, 5b to lift the log 2 to the centering location directly above it, and align one optical axis with the area-type integrated photoelectric sensors 3a, 3b arranged on both sides of the centering location, or with the centering location. A linear integrated photoelectric sensor 7a arranged at
7b, the temporary center position of approximately half the outer diameter, where the upper and lower light quantities are approximately balanced, is aligned with the centering position and is temporarily stopped. Log 2 whose temporary center position is aligned with the centering location
The shape of the face ends 2a and 2b is the area-type integrated photoelectric sensor 3a.

6b and inputs the detection signal to the computer 6. The area-type integrated photoelectric sensors 3a and 3b electrically scan the shape of the face ends 2a and 2'b of the raw wood 2 and transmit the detection signals to the computer 6, which detects a square corresponding to the maximum inscribed circle from the detection signals. While determining the optimum centering position of the log 2, that is, when cutting the log 2, the occurrence rate of short veneer veneers that are less than the length in the axial direction is the lowest, and in one direction around the circumference. The position where the continuous plywood veneer can be cut as quickly as possible is calculated and the log 2 is placed on the elevator platform la, lb, X-axis actuating mechanism 4a, 4b and Y-wheel actuating mechanism 5a, 5b. The drive of the system is automatically controlled using its output. The X-wheel operating mechanism 4a, 4
As in the case of the Y-wheel actuating mechanisms 5a and 5b described above, b is a hydraulic cylinder, a servo motor 13 for driving reciprocating members such as screws in the X-axis direction, or a hydraulic pump as an alternative, although not shown. A device consisting of hydraulic pulp, a rotary transducer 14 for position detection, etc., and an undulation in the axial direction of the log 2 placed on the lifting platform 1a, 1b are installed at appropriate locations in the axial direction of the log 2. A linear integrated photoelectric sensor 7a for sensing.

7b is arranged at one or more places on the left and right with its optical axis aligned with the centering location of the log 2, and the linear integrated photoelectric sensor 7 at
7 b Electrically scans the undulations in the axial direction of the Yoshishi log 2 and sends the detection signal to the aforementioned area-type integrated photoelectric sensor 3a,
3b, the detection signal is transmitted to the computer 6, and the area-type integrated photoelectric sensors 3a, 3b are
The optimum centering position of the log 2 calculated from the above is further corrected for missing parts and curved edges of the log 2 by detecting undulations in the axial direction.

Incidentally, both ends 2a,
2'b is detected, and the X-wheel actuating mechanism 4a is moved from the initial temporary center position to the centering position.
, 4b and the Y-wheel actuating mechanism 5a, 5b, the log 2 is readjusted and aligned, and then transferred directly to the log charger 16 as the log 15, which is transferred in parallel to the veneer race side.
Although not shown, each of the area type integrated photoelectric sensor 3 at 3 b and linear integrated photoelectric sensor 7a I 7b is equipped with an illumination lamp, flash lamp, etc. at an appropriate position. Not only are light sources attached, but the linear integrated photoelectric sensors 7a and 7b that detect the ups and downs in the axial direction of the log 2 are not limited to their type or quantity, and can be installed near the woodcut. Of course, the device for detecting the undulations in the axial direction of the raw wood 2 can be replaced by the area-type integrated photoelectric sensors 3a and 3b' for detecting the shape of the wood end 2a12b.

(Effect of the invention) As mentioned above, the present invention is directed to both ends 2a of log 2.

Area-type integrated photoelectric sensors 3a, 3 that detect the shape of 2b
b and lifting platform 1a, 1tz7) X-wheel operating mechanism 4a, 4
Since the first invention device is composed of a computer 6 that controls the Y-wheel operating mechanisms 5a and 5b, all of the complicated operations of reciprocating logs vertically and horizontally, which are required in conventional devices, can be performed. The present invention provides a fully automatic, high-performance centering device that eliminates all the drawbacks of manual centering, which lacks high-speed response and cannot be expected to have high accuracy. Both ends of log 2
Area-type integrated photoelectric sensor for detecting the shapes of a and 2b3.
In addition to sensors a and 3b, a second linear integrated photoelectric sensor 7a and 7b for detecting undulations in the axial direction of the log 2 is added.
Unlike the device of the prior application, the device of the invention does not detect the shape of both ends of the log, and furthermore, detection of the undulations of the outer diameter requires intervention from the blind spot, and its accuracy cannot be expected. This is a versatile centering device that eliminates all the drawbacks and can handle logs with complex butt end shapes, as well as logs that are missing or curved in the axial direction. Instead, when using the apparatus of the present invention, the detection and alignment operations can be completed while the log 2 is placed on the lifting platform 1a1Ib, so it is different from other types of rotary scanning type log centering devices. This invention has the economical advantage of being able to use the existing lifting equipment used for centering logs without requiring new log rotation and alignment equipment, and the implementation effect of this invention is extremely significant when it is adopted as a rationalization device for existing factories. It is.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, with FIG. 1 being a side view and FIG. 2 being a plan view. 1a, 1b... Lifting platform, 2:9.15... Log, 2
a, 2b... Tree "], 3a, 3b... Area-type integrated photoelectric sensor, 4 a, , 4 b... X-wheel operating mechanism, 5a. 5b... Y crop rotation mm structure, 6...・Computer, 7
a, 7b...Linear integrated photoelectric sensor. Patent applicant: Hashimoto Electric Industry Co., Ltd. Procedural amendment (voluntarily submitted) December 22, 1980 Patent application filed in 1988! No. 213781 No. 2, Title of the invention Automatic centering device for logs 3, Person making the amendment 4, The column of “Claims” and “Detailed description of the invention” of the specification to be amended, and the column of “Simplified description of the drawings” "Explanation" column. 5. Details of correction. (3) Specification page 4, line 2, page 15, line 17, page 5, lines 13-14, page 20, page 6, lines 2-5, page 7
Pages 7-8 lines, same page line 10. The "zonal integrated photoelectric sensor" described in line 14 of the same page, line 6 of page 8, line 12 of the same page, line 16 of the same page, line 7 of page 9, and lines 10 to 11 of page 10 is referred to as a "television camera". Correction. (4) "Square corresponding to" described in page 6, line 6 of the specification
Delete. 2. Claims (1) A television camera comprising a zone-type integrated photoelectric sensor, etc. that separately detects the shape of both ends of a log that has been placed on a lifting platform and has arrived at the centering location directly above; The present invention is characterized by comprising a computer that calculates the optimal centering position of the raw wood based on the input of the detection signal of the television camera, and controls the X movement mechanism and the Y movement movement mechanism of the lifting platform separately based on the output thereof. Automatic centering device for logs. (2) A linear integrated photoelectric sensor that detects the undulations in the axial direction of the log that has been placed on a lifting platform and has arrived at the centering location directly above, and a zone-type integrated photoelectric sensor that separately detects the shape of both ends of the log. The optimum centering position of the log is calculated by inputting the detection signals of the television camera consisting of a photoelectric sensor, etc., the linear integrated optical sensor 1, and the television camera, and the output is used to control the X movement mechanism and Y movement mechanism of the lifting platform. An automatic log centering device characterized by comprising a computer that controls each separately.

Claims (2)

[Claims] (1) By inputting detection signals from a zone-type integrated photoelectric sensor that separately detects the shape of both ends of the log that has been placed on a lifting platform and has arrived at the centering location directly above, and the zone-type integrated photoelectric sensor. An automatic log centering device comprising a computer that calculates the optimum centering position of the log and separately controls the X-wheel operating mechanism and the Y-wheel operating mechanism of the lifting platform based on the output thereof. (2) A linear integrated photoelectric sensor that detects the undulations in the axial direction of the log that has been placed on a lifting platform and has arrived at the centering location directly above, and a zone-type integrated photoelectric sensor that separately detects the shape of both ends of the log. The optimal centering position of the log is calculated by inputting the detection signals of the photoelectric sensor, the linear integrated photoelectric sensor, and the area type integrated photoelectric sensor, and the output is used to operate the X-wheel operating mechanism and the Y-wheel operating mechanism of the lifting platform. An automatic centering device for logs, characterized by comprising a computer that controls each separately.