JPS6224107A - Diameter measuring apparatus for blank log - Google Patents

Abstract

PURPOSE:To automatically measure the diameter at both ends of a blank log, by arranging a transfer means, a longitudinal blank log feeding means, a photoelectric switch, a pulse generation means, a pulse counter and the like. CONSTITUTION:A log W to be measured is transferred sideways by a first transport means 1 and then, shifted onto a first longitudinal material wood feeding means 3 one at a time. Here, the log W is longitudinally fed with the rotation of a roller unitl one end thereof is abutted on a stoper 4 to set one end thereof right and then, transferred to a second transport means 7. At first pulse generation means PE1 connected to the drive shaft of the means 7 outputs a pulse synchronizing the rotation of the drive shaft. Here, a plurality of photoelectric switchese with the optical axes at about 45 deg. and at the angle doubling it to the direction of the transfer and a measuring means containing a pulse counter are provided at the position R where the end of the log W passes. Then, the diameter is measured from the distance of the log W transferred until it breaks the photoelectric switch and the number of pulses counted with the pulse counter. Thereafter, the other end thereof is aligned with a second longitudinal blank log feeding means 12 and the diameter thereof is measured as done by the first means. After that, it is transferred to the subsequent process.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a diameter measuring device for raw wood logs, and more specifically, to a diameter measuring device for automatically measuring the diameter of raw wood logs. It's the b's.

[Conventional technology] Companies that handle a large amount of raw logs, such as manufacturing companies, chip manufacturers, and log markets, require aggregation records such as the number of logs, volume, etc., sorting by diameter class and length, and sawing. In order to determine the working method for the next process, the diameter and length of each raw wood log must be measured one by one.

Traditionally, all such work has been done manually, and the measurement results are recorded, tabulated, calculated, sorted, judged, etc.
All operations and other work were done by hand. This required a lot of labor and energy, and the measurement results were not always accurate, which was a major barrier to promoting rationalization in the wood industry.

[Object of the invention] The present invention eliminates the drawbacks of the prior art described above, and measures the diameter near the end of both ends of logs by automatically measuring the diameter near the end of each log while continuously moving the logs one by one in the lateral direction. By processing the resulting dimensional information in various ways, we can automate all tasks such as counting, recording, and sorting logs by diameter class, thereby promoting rationalization at the processing and distribution stage of logs. The present invention provides a log diameter measuring device.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention provides a diameter measuring device comprising: a transport means for transporting a log to be measured in a lateral direction;
A log vertical feeding means for positioning the end of the log, and an optical axis at a position where the end of the log passes in an angular direction of approximately 45° and a double angle thereof with respect to the transport direction of the log. a photoelectric switch arranged so as to have a pulse generating means that operates depending on the amount of logs transferred by the transfer means; ) a pulse counter configured to generate three pulses, and synchronizes with the transfer means the transfer distance during a period in which the log to be measured blocks the optical path of the photoelectric switch as the log is transferred. The diameter of the log is detected by measuring the number of pulses generated by the pulse generating means using the pulse counter.

[Configuration of embodiments of the invention] As shown in FIGS. 1 and 2, the log diameter measuring device of the present invention uses a first transport system that laterally moves the log W to be measured, such as a chain conveyor. means 1, a first loader 2 installed at the sending end of the first transfer means 1 for transferring and transferring the raw wood log W to be measured, and a plurality of thread-shaped rollers attached to the raw wood to be measured. A first log vertical feeding means 3 such as a roller conveyor that vertically feeds the log W until it comes into contact with a stopper 4 provided at one end, and the log W on this log vertical feeding means 3 is A first tripper 5 that transfers the raw wood logs W onto the second loader 6, and a second tripper such as a chain conveyor that transfers the log W on the second loader 6.
a first pulse generating means PE+ such as a pulse encoder connected to the second transferring means via a chain wheel 9, a chain 10 and a chain wheel 11 attached to the drive shaft 21; A second log vertical transport means 12 having a stopper 13 having the same configuration as the first log vertical transport means 3 is located in the opposite direction, and the log W on this log vertical transport means is transferred to a third transport means 15. A second ripper 14, a third transport means 15 for laterally transporting the log W on the second log vertical transport means 12, and a chain wheel attached to the drive fjJ axis 22 of the transport means 15. 17, chain 19, chain wheel 1
said first pulse generating means PE+ connected via 8;
a second pulse generating means PE2 similar to the above, a third log vertical transport means 20 for vertically transporting the log W, and a transport direction of the log W that is horizontally transported by the second transport means 15. A plurality of photoelectric switches P E S W + to P E arranged so as to have optical axes in the double angle direction of approximately 45 degrees.
5 including SW 3 and pulse counter PCI-PC3! It consists of a measuring means CoU. .

[Operation of the invention] The device for measuring the diameter of raw wood logs H of the present invention is constructed as described above. The process of measuring the diameter of log W will be explained.

First, as shown in FIG. 1, the log W to be measured is carried in from the direction of arrow F6 by the first transfer means 1 and transferred laterally. The log W is transferred from the first transfer means 1 to the first loader 2, and when the log W is placed on the trough of the first loader 2, the first loader 2 is rotated in the direction of the arrow F1. The logs are moved one by one onto the first vertical feed means 3. The log W on the first log vertical feeding means 3 is vertically fed by the rotation of the roller until one end contacts the stopper 4 as shown by arrow F7, and the position of one end of the log W becomes a fixed position. In this state, they are transferred onto the second loader 6 by the first tripper 5 as shown by the arrow F7, and are kept temporarily on standby before moving on to the next process.

The second transfer means 7 has a slight elevation angle as shown in FIG. I'm making it a thing.

The second transfer means 7 is rotationally driven by an unillustrated power source indicated by an arrow F5, and the second transfer means 7 is driven 4! A
The first pulse generating means PE+ coupled to 21 outputs pulses synchronized with the rotation of the drive @21 of the second transport means 7.

In the middle part of this second transport means 7, the raw wood log W to be measured is
As shown in FIG. 2, there are projectors A and B and a receiver A' in the MR where the end of the light passes through.

A first and a second photoelectric switch P E S consisting of B'
W 1. P E S W 2 is installed at an angle of approximately 45° with the moving direction (arrow F4) of the log W, and a third photoelectric switch P E consisting of a light emitter CJ3 and a light receiver C' is installed in a direction perpendicular to the moving direction F4. S W 3 is 11η
It is preached like a j-bo. In this configuration, if the first loader 6 is rotated in the F3 direction every time one convex object 8 passes in synchronization with the rotation of the second transfer means 7, the The raw wood logs W are sequentially fed into the transfer means 1 for use 2.

Next, as the second transfer means 7 rotates, the log W is supported by the convex object 8 and transferred in the direction of arrow F4, but in the process of movement, the photoelectric switch P E S W
Since the pulse counters P (, +~PC3 are provided corresponding to the I-P E S W 3, respectively, the raw wood log W is used for each of the photoelectric switches P E S W +~ P E S W 3). A period occurs during which the light rays from C are blocked.

Only during this interruption period, the diameter of the log W is measured by counting the number of pulses generated from the first pulse generating means PE+. That is, during the period when the light beams from the projectors A-C are blocked, the logs W are transported by the second transport means 7.
From the number of pulses during this interruption period, the diameter dimensions of the log W are as shown in Fig. 3 (D a, D
b, D c can be calculated by the measuring means CoU.

The log W to be measured, whose diameter on one end side has been measured in this way, is transferred from the third transport means 7 to the second vertical log feed means 12, and the other end of the log W comes into contact with the stopper 13. It is then vertically fed to the third transport means 15.

This third transfer means 15 also has a slight elevation angle like the second transfer means, and is supported by the protrusion 16 and moves in the F9 direction. The other end has a photoelectric switch array having the same configuration as the above-mentioned R position and measuring means CO at position S.
The diameter of the other end is measured with U.

The π1 measured log W whose diameter has been measured from three directions on the other end side is transferred from the third moving means 15 to the third log vertical feeding means 20
and is transferred to the next process in the direction of arrow F10.

For the logs to be measured that follow, 31 measurements of the diameter of the last day and the head part are carried out in the same manner as described above, and the measuring means Cou
The measurement results are automatically recorded and processed by an electronic computer (not shown), and sorted by volume and diameter class.
] and other operations.

[Effects of the Invention] As described above, the present invention includes a transport means for laterally transporting the raw log to be measured, a raw log vertical transport means for positioning the end of the raw log, and a transport means for transporting the raw log to be measured in the horizontal direction, a log vertical feeding means for positioning the end of the raw log, and a transport means for transporting the raw log to be measured in the horizontal direction. a photoelectric switch disposed such that the optical axis is at an angle of approximately 45° with respect to the transport direction of the log, and a photoelectric switch that is interlocked with the transport of the log by the transport means; It has a pulse generating means that operates, and a pulse counter that is configured to perform a counting operation only while the optical path of the photoelectric switch is blocked by the log log, and the log counter to be measured is provided as the log log is transferred. The diameter of the raw wood log is detected by measuring the number of pulses generated by the pulse generating means with the transporting means during a period in which the optical switch is blocking the optical path of the photoelectric switch. , it is possible to automatically measure the diameter of the end and the base of a log, and since it is measured from multiple directions, it is a natural object, and the diameter of a log whose shape and size are not constant, that is, it is not a perfect circle. Since it can be accurately measured and tabulated, the S1 measurement data can be effectively used for the number of timbers, volume of timber, sorting by diameter class, etc., and has excellent industrial effects such as the ability to automate the sawmilling system.

[Brief explanation of drawings]

Each of the figures shows an embodiment of the present invention; Fig. 1 is a plan view showing an overview of the device configuration, Fig. 2 is a side view of the main parts, and Fig. 3 is a diameter measurement direction for logs. FIG. 1.7.15--Transporting means, 3,12.20...Log vertical feeding means, P E S W + ~ P E S W
3...Photoelectric switch, PE+, PE2...Pulse generating means, PC+~PC3...Pulse counter, W.
...Log log to be measured.

Claims (1)

[Claims] a transport means for transporting the raw wood log to be measured in the horizontal direction; a raw wood vertical transport means for positioning the end of the raw wood log; and an optical axis is set in the transport direction of the raw wood log at a position where the end of the raw wood log passes. a photoelectric switch disposed so as to have an optical axis in an angular direction that is approximately 45° and a double angle thereof; a pulse generating means that operates in conjunction with the amount of logs transported by the transporting means; and an optical path of the photoelectric switch. and a pulse counter configured to perform a counting operation only while the log is blocked by the log, and the period during which the log to be measured blocks the optical path of the photoelectric switch as the log is transferred. A diameter measuring device for a raw log, characterized in that the diameter of the log is detected by measuring the number of pulses generated by the pulse generating means synchronized with the transporting means with the pulse counter.