JP2000271906A - Precut fabrication of wood and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an erroneously fabricated wood from being shipped and realize a useful application to quality control by measuring the length of a precut wood and comparing the measured length with fabrication length data already inputted in a computer and perform a subsequent fabrication process using data which interprets the comparison result an inside or outside a reference value as quality control data for each precut wood. SOLUTION: A wood 1 loaded into the loading part 2 of a precut fabricating device is fed to a cutting means 4 after a length fabrication size with an optimal yield is worked out based on fabrication data already inputted in a computer using judging means 3. At the same time, data on the fabrication size data of a mortise or the like to be formed in the side face or the cross section of a wood, is transferred to a side face fabricating device 5 or an end fabricating device 7, and the length fabrication size data is transferred to a length inspecting part 6. The precut wood 1 is cut based on the length fabrication size data using a cutter 4 and then a mortise or the like is formed in the side face using the side face fabricating device 5 and further, the length is measured by the length inspecting part 6 to measure whether an error between the measure length and the already entered data stays within a tolerable range for use. This measurement is recorded together with the judgment data. Thus it is possible to prevent the wood outside the tolerable range from being shipped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-cutting machine for measuring the length of a pre-cut piece of wood which has been length-cut and inputting the length of the pre-cut piece of wood to a computer in advance. Determined on the pre-cut processing line whether it is within the reference value compared with the processing length data, record the determination data and measurement value data as data for each pre-cut wood after processing,
In addition to the purpose of utilizing it as quality control data (one that can be stored in a storage medium and displayed at any time by printing out, etc.), it is also possible to ship precut wood of inappropriate length outside of the standard value that can be used as building wood. The present invention relates to a method and apparatus for precutting wood, which can be prevented beforehand.

[0002]

2. Description of the Related Art Conventionally, in a pre-cut factory, quality control is performed by measuring the length of a pre-cut wood processed by a pre-cut processing machine by sampling inspection. However,
Due to the characteristics of the pre-cut wood, each pre-cut wood is cut according to different processing data, and thus a length defect that cannot be detected by a sampling inspection has been a problem.

[0003]

In the technique of the conventional pre-cutting machine, the wood introduced into the pre-cutting line of the pre-cutting machine is pre-cut based on the pre-cutting data of each pre-cutting wood which is input to a computer in advance. Processing is performed. Naturally, if the pre-cut processing is performed according to the processing data stored in advance, the pre-cut timber substantially according to the processing data is completed. However, due to problems such as differences in the thermal expansion coefficient between wood and metal, problems with the control device of the pre-cutting machine, and wear of the processing blade, etc., it is out of the allowable range that can be used as building wood. Precut wood with a length of cut processing dimensions may be processed. Conventionally, in pre-cut mills, since pre-cut wood processed by a pre-cutting machine has a large number of processed pieces (up to several hundred pieces per building), it is time and labor-intensive to inspect all. Without
The quality is controlled by measuring the length by sampling inspection.
However, unlike other line-processed general industrial products (manufacturing large quantities of the same shape), due to the characteristics of precut wood, each precut wood is processed according to different processing data, so all of them are inspected. Since it is not done, oversight is inevitably generated more than in the line processing of the above general industrial products. As described above, despite the imperfect inspection method, a lot of time and labor is spent for the sampling inspection, which is a problem. Therefore, an object of the present invention is to perform a length inspection on all precut wood pieces that are cut in length by a precutting machine, and perform erroneous processing (length).
Pre-shipped timber can be prevented from being shipped, and length data is recorded for each processed pre-cut timber, and quality control data (stored in a storage medium,
It is intended to provide a method and apparatus for precutting wood, which can be utilized as a printout or the like which can be displayed at any time.

[0004]

According to the first aspect of the present invention,
On the pre-cutting line of the pre-cutting machine, measure the length of the pre-cut lumber that has been cut to length, and compare it with the processing length data input in advance to the computer and find that it is within the reference value or outside the reference value. It is characterized in that the next processing is performed while determining and recording the data as quality control data for each pre-cut lumber after processing. According to a second aspect of the present invention, there is provided the processing means according to the first aspect.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method and apparatus for precutting wood according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a wood pre-cut processing apparatus of the present invention, FIG. 2 is a schematic diagram of an inspection unit of the pre-cut processing apparatus, and FIG. 3 is a schematic view of an embodiment of the inspection apparatus of the inspection unit. In FIG. 1, for the wood 1 put into the input section 2 of the pre-cut processing device, the determining means 3 calculates the length of the best yield from the information of the processing data previously input to the computer. The data of the processing dimensions is transferred to the cutting device 4 located next to the pre-cut processing line, and the cutting device 4 performs cutting based on the data. At the same time, the data of the processing dimensions of the mortise and the like to be applied to the side surface and the butt end, which are the other data of the pre-cut wood 1A,
Is forwarded to Further, the data of the length processing dimensions is transferred not only to the cutting device but also to the length inspection unit 6. The precut wood 1A is cut by the cutting device 4 based on the length processing dimension data, and then conveyed to the side surface processing device 5, where the side surface is processed into a mortise or the like. Next, the precut wood 1 </ b> A that has been subjected to length cutting and side mortise processing is conveyed to the length inspection unit 6, and the length is measured by the inspection device 9. The length of the measured precut wood 1A is compared with the length processing data previously input to the computer,
It is measured whether or not the error is within the allowable use range, and the determination data and the measurement data are recorded so as to be distinguishable for each precut wood after processing. With this recorded data, the measured length of all pre-cut lumber after processing can be grasped, and it is possible to prevent the shipment of defective pre-cut lumber that has been cut to length outside the permissible range of use that is inappropriate for building wood. it can. The precut wood 1A that has been subjected to the predetermined measurement by the inspection device 6 is transported to the next wood opening processing device 7.
When the measurement device 6 detects a measurement value outside the allowable use range, the alarm lamp 11 blinks to notify the operator. When the alarm lamp blinks frequently or continuously, a command to stop the pre-cut processing is issued to the cutting device 4 to prevent the continual erroneous cutting of the pre-cut wood having a poor length and the erroneous cutting loss caused thereby. Pre-cut system software changes can also be made to prevent this. Next, in FIG. 2, a mode in which the precut wood 1 </ b> A is inspected in the block described in FIG. 1, particularly in the length inspection unit 6, which is the center of the present invention, will be described. In the side surface processing device 5, the precut wood 1 </ b> A that has been subjected to side processing such as a mortise is conveyed by the conveying roller 8 to the length inspection unit 6. Pre-cut wood 1 transported vertically
A is translated and conveyed by the length inspection unit 6 to a position sandwiched between the inspection devices 9 in the horizontal direction. The inspection devices 9 are installed at both ends of the inspection unit 6 at the inspection stop position. The precut wood 1A conveyed in parallel movement is fixed in position by two stoppers 10 on the left and right sides so that inspection can be performed easily and accurate measurement data can be obtained. The length of the precut wood 1A whose position is fixed is measured by the inspection device 9, and the measured length of the precut wood 1A is compared with the length of the precut wood 1A that has been input to the computer in advance, and the error is determined. Is recorded so that it can be determined for each precut piece of wood after precutting. The precut wood 1A that has been subjected to predetermined inspection and measurement by the inspection device 9 is parallel-transported and conveyed to the conveyance roller 8 by the release of the stopper 10 and conveyed to the next wood opening processing device 7 to be subjected to the next processing. FIG. 3 shows the inspection device 9.
2 shows an aspect and principle in which the length of the precut wood 1A is measured. The inspection device 9 is capable of inspecting the length of all pre-cut wood without lowering the processing capability (speed) of the pre-cut wood processing device, and the principle is based on the inspection devices 9 installed at both ends of the pre-cut wood 1A. The length of the precut wood 1A is measured by returning the laser beam applied to each of the left and right lips of the precut wood 1A (a known technique) and measuring the length of the precut wood 1A. According to the above-mentioned inspection method, the length of the precut wood having different lengths can be accurately measured instantaneously without mechanically driving the detector, thereby providing a high-speed and highly reliable inspection apparatus without mechanical wear. The length of the precut wood 1A is determined by the following equation (1). X = C- (A + B) (1) A: Precut wood 1A from the right end of the inspection device 9 (left)
B: Precut wood 1A from the left end of the inspection device 9 (right)
From the left end of the inspection device 9 (right) to the inspection device 9 (left)
X: Length of precut wood 1A As another example, as shown below, the length inspection unit can be installed at another position on the precut processing line of the precut processing machine. . (A) The length inspection unit 6 is installed next to the cutting device 4. (B) The length inspection unit 6 is installed next to the wood opening processing device 7. (C) The length inspection unit 6 is installed next to the printing device (not shown). (D) The length inspection unit 6 is installed at the last part (not shown) of the pre-cut processing line of the pre-cut processing machine.

[0007]

As described above, by using the present invention, the length of the precut wood that has been subjected to the length cutting is measured on the precutting line of the precutting machine, and the length of the precutted wood is input to the computer in advance. Compared with the length processing data, it is judged that it is within the reference value or outside the reference value. After cutting the judgment data and measurement value data, quality control data for each pre-cut wood (stored in the storage medium and printed as needed) It is possible to perform the next processing while recording as a state that can be displayed as if it were out. With this quality control data, the measured length of all pre-cut wood after processing can be easily grasped, and the shipment of pre-cut wood that has been cut to length outside the permissible range of use that is inappropriate as architectural wood can be anticipated. An industrially useful effect that can be prevented is brought about.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an apparatus for precutting wood according to the present invention.

FIG. 2 is a schematic view showing an inspection unit of the wood pre-cut processing apparatus of the present invention.

FIG. 3 is a schematic view of an embodiment of an inspection device of the inspection unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wood 1A Pre-cut wood 2 Input part 3 Judgment means 4 Cutting device 5 Side processing device 6 Length inspection part 7 Wood opening processing device 8 Conveyance roller 9 Inspection device 10 Stopper 11 Alarm lamp

Claims (2)

[Claims] A length of precut wood which has been cut and cut on a precutting line of a precutting machine is measured and compared with the processing length data inputted in advance to a computer to be within a reference value or a reference value. A precutting method for wood, characterized in that it is determined that the value is out of range, and the next processing is performed while recording the determination data and the measured value data as data for each precut wood after processing. 2. The method according to claim 1, wherein said processing is enabled.
Precutting equipment for wood.