JP2010008239A - Method and apparatus for inspecting external form of lumber product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for inspecting an external form of a lumber product, capable of automating a sensor-based detection of a defect of a surface-machined lumber product and improving production efficiency. <P>SOLUTION: The method for inspecting whether dimensions/external form of the lumber product (sawn lumber W) sawn as a board or square log are appropriate includes: the two-dimensional data measurement step of moving the lumber product in a longitudinal direction N to continuously measure a width dimension L1 and height dimension L2 of the lumber product in the longitudinal direction N; the volume computation step of computing a volume of the lumber product from integration of a cross-sectional area of the lumber product based on the two-dimensional data with a move distance or move time of the lumber product; and the volume determination step of comparing the computed volume with an allowable range of a preset volume to determine the lumber product an acceptable volume if the computed volume is within the allowable range, and an unacceptable volume if beyond the allowable range. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lumber product outer shape inspection method and apparatus for inspecting the quality of the size and outer shape of a lumber product.

  In wood processing, an automatic lathe (molder machine) is known that continuously cuts the surface of a conveyed lumber with a rotary cutter for cutting (see Patent Document 1).

JP-A-11-216701

  In some cases, the surface of the lumber product processed by such a molder machine has a defect portion such as a chip, a crack, and a knot. At present, the inspection of the defective portion relies on the visual inspection by the operator. For this reason, the visual inspection varies depending on the skill of the operator, the quality is not constant, and the inspection time is so slow that it cannot be compared with the processing speed of the molder machine that has been accelerated in recent years. Development of inspection technology to improve these is desired.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for inspecting an outline of a lumber product in which a defective portion of a processed lumber whose surface has been machined is detected by a sensor so as to be automated to increase production efficiency.

Means for Solving the Problems and Effects of the Invention

  In order to solve the above-mentioned problems, a method for inspecting a lumber product according to the present invention is a method for inspecting a lumber product for inspecting whether the size and the outer shape of the lumber product after cutting as a plate material or a square material are appropriate. A two-dimensional data measuring step of continuously measuring the width and height of the sawn product in the longitudinal direction while moving the sawn product in the longitudinal direction, and the sawn product based on the two-dimensional data. Based on the integration of the cross-sectional area and the travel distance or travel time of the lumber product, the volume calculation step of calculating the volume of the lumber product, and the calculated volume and a preset volume allowable range are compared, If the calculated volume is within an allowable range, the lumber product is a volume acceptable product, and if the calculated volume is outside the acceptable range, a volume determining step for determining a volume rejected product is included.

  By adopting the above-described configuration, the cut and sawed lumber product is subjected to pass / fail judgment by volume comparison during its transportation, so that it can be processed faster than the inspection time of visual inspection by the operator, and the speed of the molder machine is increased. It is possible to automate by interlocking with each other, and the production efficiency can be improved.

  Further, the two-dimensional data measurement step of the method for inspecting a lumber product according to the present invention includes the step of measuring the concave width dimension and the concave height dimension of the concave defect portion existing on the machined surface of the lumber product. Continuously measuring in the direction, the volume calculation step is based on the integration of the cross-sectional area of the defective portion by the two-dimensional data and the moving distance or moving time of the lumber product, the volume of the defective portion The volume determination step includes comparing the calculated volume of the defect portion with a preset allowable range of the defect portion volume, and if the calculated volume of the defect portion is within the allowable range. The lumber product may be characterized as including a volume acceptable product, and on the other hand, if the lumber product is outside the allowable range, it may be determined as a volume unacceptable product.

  With the above configuration, if there is a local defect, the presence or absence can be reliably inspected. In addition, since the dimension of the defective part is measured, the measurement dimension can be used for the pass / fail judgment based on the size of the defective part, and inspection variations such as visual inspection do not occur, and the inspection quality is stabilized. In addition, since the defect part can be confirmed by volume, it is also possible to distinguish the type of defect part, for example, chipping, cracking, missing part, and the pass / fail judgment can be subdivided, so that the inspection that matches the purpose of use of the lumber product can be performed. It is possible to provide a contour inspection apparatus that can be used and the degree of freedom of use of the lumber product after inspection is widened and is rarely excluded as unusable, so that the lumber product can be effectively used.

  Further, in the method for inspecting the appearance of a lumber product according to the present invention, in the volume determination step, in order to determine the lumber product as a volume acceptable product or a volume unacceptable product, the calculated volume value is a lower limit value of the allowable range. By being characterized by being determined by whether or not it falls below, lumber products having a small volume can be excluded as defective products.

  Further, according to the method for inspecting a lumber product according to the present invention, at least one of the width dimension and the height dimension or the concave width dimension and the concave height dimension in the two-dimensional data is within an allowable range in the longitudinal direction of the lumber product. If the number of times exceeds the permissible range, the lumber product is determined to be a defective product. It can cope with inspection of various lumber products with different shape dimensions.

  In addition, according to the method for inspecting the shape of a lumber product according to the present invention, whether at least one of the width dimension and the height dimension in the two-dimensional data of the lumber product that has passed the volume is within the preset allowable range. In addition to the pass / fail judgment by volume, the external dimensions (width dimensions and width dimensions) are included. The inspection quality can be improved with high accuracy since the inspection is performed by the height dimension, or the concave width dimension and the concave height dimension.

  Moreover, the outline inspection method of the lumber product of this invention outputs a fail signal to the said conveyance line with respect to the said lumber product determined to be a volume reject product or a reject product, and performs a predetermined fail process. Or, it can be characterized by including a post-processing step that outputs a pass signal to the transport line and performs a predetermined pass process for the lumber product that is a volume pass product or a pass product, for example, If the post-processing step is performed by an apparatus that can give a pass / fail indication, it is possible to specify whether the product is a non-defective product or a defective product. Therefore, even if they are mixed by mistake, they can be used separately.

  Further, the sawing product outer shape inspection apparatus of the present invention is a sawing product outer shape inspection device for inspecting whether or not the size and outer shape of the sawed product after cutting as a plate material or a square material are appropriate, A conveying line for moving the lumber product in the longitudinal direction, and the width and height dimensions of the lumber product are continuously moved in the longitudinal direction while moving the lumber product in the longitudinal direction on the conveying line. A two-dimensional data measuring apparatus including a width dimension sensor and a height dimension sensor to be measured, a conveyance state measuring apparatus for measuring a movement distance or a movement time of the lumber article in the conveyance line, and the lumber article based on the two-dimensional data Volume calculating means for calculating the volume of the lumber product based on the integral of the cross-sectional area of the lumber product and the moving distance or moving time of the lumber product, and an allowable range of the calculated volume and a preset volume And if the calculated volume is within the allowable range, the lumber product is a volume acceptable product, and on the other hand, if it is outside the allowable range, the volume judgment means for determining that the volume is unacceptable. .

  By adopting the above-described configuration, the cut and sawed lumber product is subjected to pass / fail judgment by volume comparison during its transportation, so that it can be processed faster than the inspection time of visual inspection by the operator, and the speed of the molder machine is increased. It is possible to automate by interlocking with each other, and the production efficiency can be improved.

  Further, the two-dimensional data measuring device of the saw product outer shape inspection apparatus according to the present invention is configured such that the concave width dimension and the concave height dimension of the concave defect portion existing on the cut machining surface of the lumber product are the longitudinal dimension. The volume calculating means calculates the volume of the defective portion based on the integration of the sectional area of the defective portion based on two-dimensional data and the moving distance or moving time of the lumber product. The volume determination means compares the calculated volume of the defect portion with a preset allowable range of the defect portion volume, and if the calculated volume of the defect portion is within the allowable range, The lumber product may be a volume acceptable product, and on the other hand, if it is outside the allowable range, it may be judged as a volume unacceptable product.

  With the above configuration, if there is a local defect, the presence or absence can be reliably inspected. In addition, since the dimension of the defective part is measured, the measurement dimension can be used for the pass / fail judgment based on the size of the defective part, and inspection variations such as visual inspection do not occur, and the inspection quality is stabilized. In addition, since the defect part can be confirmed by volume, it is also possible to distinguish the type of defect part, for example, chipping, cracking, missing part, and the pass / fail judgment can be subdivided, so that the inspection that matches the purpose of use of the lumber product can be performed. It is possible to provide a contour inspection apparatus that can be used and the degree of freedom of use of the lumber product after inspection is widened and is rarely excluded as unusable, so that the lumber product can be effectively used.

  Further, in the lumber product outer shape inspection apparatus of the present invention, in the volume determination means, in order to determine the lumber product as a volume acceptable product or a volume unacceptable product, the calculated volume value is a lower limit value of the allowable range. By being able to be determined by whether it is less than, lumber products with a small volume can be excluded as defective products.

  Further, the profile inspection apparatus of the saw product according to the present invention is such that at least one of the width dimension and the height dimension in the two-dimensional data, or the concave width dimension and the recess height dimension is within an allowable range in the longitudinal direction of the saw product. If the number of times exceeds the permissible range, the lumber product can be determined as a defective product. It can correspond to the inspection of various lumber products.

  Further, the profile inspection apparatus for lumber products of the present invention determines whether or not at least one of the width dimension and the height dimension in the two-dimensional data in the lumber product regarded as a volume-accepting product is within a preset allowable range. In addition to the pass / fail judgment by volume, the external dimensions (width dimensions and width dimensions and The inspection quality can be improved with high accuracy since the inspection is performed by the height dimension, or the concave width dimension and the concave height dimension.

  Moreover, the outline inspection apparatus of the lumber product of this invention outputs a fail signal to the said conveyance line with respect to the said lumber product determined to be a volume reject product or a reject product, and performs a predetermined fail process. Or, for the lumber product that has been passed a volume pass or pass product, it can include a signal output means for outputting a pass signal to the transport line and performing a predetermined pass process. If it is a post-processing step by an apparatus that can be applied, it can be determined whether it is a non-defective product or a defective product, so that even if they are mixed by mistake, they can be used separately.

  In addition, a workpiece detection sensor that detects that the leading end of the sawn product to be transported and the rear end of the sawn product has passed is installed in the transport line of the outline inspection apparatus for sawn product of the present invention. By using the detection sensor signal, the travel distance or travel time of the lumber product to be inspected can be obtained, so even if the lumber product has a different height, it can be used without adjusting the inspection position of the workpiece detection sensor. This makes it possible to handle various types of lumber products.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram showing a production line including an external shape inspection apparatus for processed lumber W as a lumber product of the present invention. In FIG. 1, the processed lumber W is a laminar plate material used for laminated wood, for example, and has a rectangular cross section, and the rectangular cross section is a continuous long plate in the longitudinal direction N. It is formed. The processed lumber W is not limited to a plate material, and may be a square member used for a pillar or the like.

  In the processed lumber W, the rectangular machine has a rectangular cross section that is uniformly continuous in the longitudinal direction N by the molder machine 1 shown in the background art, and the rough lumber W1 in which the width dimension L1 and the height dimension L2 in the rectangular section are not constant. The four surfaces W1a are cut to make the width dimension L1 and the height dimension L2 constant. In the case of this example, as shown in FIG. 2, the four surfaces of the upper surface Wa, the lower surface Wb, the left side surface Wc, and the right side surface Wd of the processed lumber W are formed as cutting surfaces that are cut by the molder machine 1.

  Returning to FIG. 1, a mold inspection machine 2 is connected to the molder machine 1 to form a series of conveyance lines. This external shape inspection apparatus 2 can inspect the presence or absence of defective portions We, such as chips, cracks and breakthroughs, which are the causes of quality defects present on the cut surface of the processed lumber W that has been cut out from the molder machine 1. It is. This external shape inspection apparatus 2 detects the position in the conveyance direction A of the inspection processing unit 3 that functions as a two-dimensional data measurement apparatus that inspects whether the dimensions and the external shape of the processed lumber W are appropriate. And a position detection unit 4 functioning as a conveyance status measuring device.

  As shown in FIG. 2, the inspection unit 3 includes a plurality of two-dimensional displacement sensors so as to face the upper surface Wa, the lower surface Wb, the left side surface Wc, and the right side surface Wd as cutting surfaces of the processed lumber W. The head 3a (for example, LJ-G series manufactured by Keyence Corporation) is disposed at a predetermined position in the transport path in the transport line. The sensor head 3a disposed opposite to the upper surface Wa and the lower surface Wb is a width dimension sensor, and the sensor head 3a disposed opposite to the left side surface Wc and the right side surface Wd is a height dimension sensor. These sensor heads 3a continuously measure the width L1 and the height L2 of the processed lumber W in the longitudinal direction N in the conveying process.

  As shown in FIG. 3, this two-dimensional displacement sensor is a system using triangulation, and laser light spread in a fan shape from the light projecting portion 3a1 of the sensor head 3a so as to intersect the longitudinal direction N of the processed lumber W. R1 is projected onto the cut surface of the processed lumber W. At the projection location R2 on the cut surface, when the laser beam R1 is diffusely reflected, the reflected light R3 enters the light receiving portion 3a2 to form an image, and the position / shape (including the defective portion We) at the projection location R2 is formed. By detecting the change, the cross-sectional shape dimensions (width dimension L1 and height dimension L2) of the processed lumber W are measured. In addition, although the measurement sampling period in the two-dimensional displacement sensor depends on the moving speed of the processed lumber W, a high speed is advantageous in improving the measurement resolution.

  As shown in FIG. 4, the light projecting unit 3a1 of the sensor head 3a includes a laser drive circuit 3a3, a semiconductor laser 3a4 that is driven (projected) by the laser drive circuit 3a3, and a laser that is projected from the semiconductor laser 3a4. And a light projecting lens 3a5 for projecting the light R1 in a fan shape. The light receiving unit 3a2 of the sensor head 3a receives the reflected light R3, and receives the reflected light R3 collected by the light receiving lens 3a6 to detect the displacement of the surface by the displacement detecting element 3a7 (area image sensor). Or a two-dimensional image sensor), converted into an electrical signal by the displacement detection element 3a7, and output to the outside through the signal amplification circuit 3a8. In short, the local concave defect portion We in the laser beam projection direction of the processed lumber W on the projection line R2 of the laser beam R1 (in the example of FIG. 4 in the width dimension L1 direction and the height dimension L2 direction of the processed lumber W). As shown in FIG. 5, the two dimensions include the projection width R4 of the projection point R2 with the concave width dimension L3 in the direction of the width L1 as the X axis and the concave height dimension L4 in the height dimension L2 as the Y axis. It is an electrical output as two-dimensional data including axis coordinates.

  In addition, the sensor heads 3a arranged to face the upper surface Wa and the lower surface Wb of the processed lumber W are provided at two locations on each surface, but the number of the arrangement is not limited at all, and the laser light R1 If the projection width is wider than the width dimension L1 of the processed lumber W, each surface can be handled by a single sensor head 3a (see FIG. 3).

  As described above, the laser beam R1 is projected by the plurality of two-dimensional displacement sensors respectively opposed to the upper surface Wa, the lower surface Wb, the left side surface Wc, and the right side surface Wd as the cutting surfaces of the processed lumber W. The cross-sectional shape of the processed lumber W is measured.

  The position detection unit 4 is provided on the front and rear sides in the conveyance path of the processed lumber W in the conveyance line so as to function as a workpiece detection sensor. The position detection unit 4 includes a light emitting unit 4a and a light receiving unit 4b. Is received by the light receiving unit 4b, and the presence or absence of the processed lumber W and the position during conveyance can be detected in a state where the light is blocked by the processed lumber W. As an example, it is installed to detect that the front end of the processed lumber W has passed and the rear end thereof has passed, and the movement distance or movement of the processed lumber W to be inspected by the signal of the workpiece detection sensor. Time can also be required.

  As shown in FIG. 6, the external shape inspection apparatus 2 includes a transport unit 5 that constitutes a part of a transport line that transports the processed lumber W in the longitudinal direction N thereof. A plurality of the conveying sections 5 are arranged at predetermined intervals in the conveying direction A in a state where the conveying rollers 5b connected to a driving device 5a such as a motor are brought into contact with the surface of the processed lumber W with the rotation driving controlled. ing. Moreover, the encoder 5c for detecting the movement distance or movement time with respect to the conveyance direction A of the processed lumber W from rotation of the conveyance roller 5b is provided.

  Further, as shown in FIG. 7, on the downstream side in the transport direction A, a marking device 6 is provided for use in a post-processing step for providing the processed lumber W with characters, figures, symbols, logos, etc. as pass / fail indications. It is done. Examples of the marking device 6 include an ink jet system that prints on an object by blowing ink, and a laser marker system that prints by applying heat to the object with the force of a laser beam.

  FIG. 8 is an electric block diagram showing the electrical connection relationship of each of the above components in the outer shape inspection apparatus 2. In FIG. 8, the sensor head 3 a is connected to the controller 8 via the amplifier 7. If the sensor head 3a has a built-in amplifier, the external amplifier 7 is not necessary. The controller 8 is connected to the control device 9. The control device 9 is also connected to the position detection unit 4, the conveyance unit 5, the marking device 6 and the like, and controls each device.

  The controller 8 includes an arithmetic function unit such as a microcomputer. The configuration of the microcomputer in the controller is well known and will not be described in detail, but includes an I / O port, a CPU, a ROM, and a RAM, which are connected by a bus. Of the ROM and RAM functioning as the storage unit, the ROM stores various known programs for control necessary for calculations and the like.

  The controller 8 configured as described above calculates the two-dimensional data input as the measurement data of the displacement of the shape of the cut surface including the defective portion We from the sensor head 3a, and includes the concave shape of the defective portion We. The controller 9 has a function of inputting dimensional values (the surface position of the cut surface, the concave width dimension L3 and the concave height dimension L4 of the defect portion We) to the control device 9.

  Further, as shown in FIG. 9, the control device 9 is configured around a CPU 9a, and a ROM 9c is connected to the CPU 9a via an internal bus 9b. Various processes are executed according to the program stored in the ROM 9c. Further, a RAM 9d is connected to the CPU 9a via an internal bus 9b. The RAM 9d appropriately stores data and programs necessary for the CPU 9a to execute various processes. The CPU 9a is also connected to an input / output interface 9e connected via an internal bus 9b, to which a controller 8, a position detection unit 4, a transport unit 5, a marking device 6 and the like are connected to control each device.

  The control device 9 configured in this manner functions as a volume calculation means. As an example, a two-dimensional data measuring device including a width dimension sensor (sensor head 3a) and a height dimension sensor (sensor head 3a) that continuously measure the width dimension L1 and height dimension L2 of the processed lumber W in the longitudinal direction N. The cross-sectional area of the processed lumber W calculated based on the two-dimensional data (the width dimension L1 and the height dimension L2) from the (inspection unit 3), and the processed lumber from the conveyance status measuring device (position detection unit 4 or encoder 5c). A function of calculating the entire volume of the processed lumber W based on the integration of the moving distance or moving time of W is provided.

  When the defect portion We is present in the processed lumber W, the volume calculation function calculates the calculated value obtained by subtracting the volume of the defect portion We based on the concave width dimension L3 and the concave height dimension L4 of the defect portion We. The total volume of W, or even if there is a defective portion We, the calculated value that does not subtract the volume of the defective portion We is the total volume of the processed lumber W, or the concave width dimension of the defective portion We It is possible to calculate the volume of only the defect portion We based on L3 and the concave height dimension L4.

  The control device 9 also functions as a volume determination unit. As an example, the entire volume of the processed lumber W calculated by the volume calculating means is compared with the allowable range of the entire volume of the processed lumber W preset and stored in the RAM 9d, and the calculated volume is within the allowable range. The processed lumber W is a volume acceptable product, and on the other hand, it has a function of determining that it is a volume unacceptable product if it is outside the allowable range.

  As another example, the volume of only the defective portion We calculated by the volume calculating means is compared with the allowable range of the volume of only the defective portion We stored in the RAM 9d in advance, and the calculated volume is within the allowable range. If there is, the processed lumber W is a volume acceptable product, and on the other hand, if it is outside the allowable range, it has a function of determining that it is a volume unacceptable product.

  In this volume determination means, in order to determine the processed lumber W as a volume rejected product, it is determined whether or not the calculated volume value is below the lower limit value of the allowable range.

  The control device 9 also functions as addition determination means. As an example, it is determined whether or not at least one of the width dimension L1 and the height dimension L2 in the two-dimensional data in the processed lumber W that is a volume acceptable product by the volume determination means is within a preset allowable range, and the allowable range If it is, it has a function to judge that it is a pass product, and if it is not within the allowable range, it is a reject product.

  As another example of this addition determination means, a volume obtained by calculating the size of the local concave defect portion We (the concave width dimension L3 and the concave height dimension L4) on the cut surface of the processed lumber W is set in advance. The processed lumber W is regarded as an acceptable product if the calculated volume is within the acceptable range, and on the other hand, if the calculated volume is outside the acceptable range, it is provided with a function of determining as a rejected product. You can also.

  In this addition determination means, in order to determine the processed lumber W as a rejected product, it is determined by whether or not the volume value of the concave shape of the calculated defect portion We is below the lower limit value of the allowable range. . Further, in order to determine the processed lumber W as a rejected product, at least one of the data of the concave width dimension L3 and the concave height dimension L4 of the defective portion We has an allowable range in the longitudinal direction N of the processed lumber W. It is determined whether or not the processed lumber W is unacceptable when the number of times exceeds the allowable range.

  In addition, for the processed lumber W determined as volume rejected or rejected by the volume determining means and the additional determining means, a reject signal is output to the transport line and a predetermined reject processing is performed, or the volume passed The control device 9 can be provided with a mechanism that outputs a pass signal to the transfer line and performs a post-processing step for performing a predetermined pass process on the lumber product that is a product or a pass product.

  Next, the inspection method in the external shape inspection apparatus of the lumber product of this invention is demonstrated based on FIG. When the processed lumber W processed by the molder machine 1 is conveyed to the outer shape inspection apparatus 2, the processed lumber W is detected by the position detection unit 4 arranged in the outer shape inspection apparatus 2 (step S1). Subsequently, the dimensions and shapes of the four surfaces including the defect portions We such as chipping, cracking, and breakage of the upper surface Wa, the lower surface Wb, the left side surface Wc, and the right side surface Wd of the cutting surface of the processed lumber W in the transported state are detected. The sensor head 3a continuously measures (two-dimensional data measurement process). Thereafter, the controller 8 calculates the two-dimensional data inputted as the measurement data of the dimensions and shape of the four surfaces including the defective portion We from the sensor head 3a, and calculates the concave measurement size value (the concave width size L3 and the concave portion We). Data including the concave height dimension L4) is input to the control device 9 (step S2).

  Furthermore, a volume calculation process is performed by the control device 9. This volume calculation process includes four-dimensional dimension / shape data including the concave measurement dimension values (the concave width dimension L3 and the concave height dimension L4) of the defect portion We input from each controller 8, and the conveyance status measurement device. , The position detection unit 4 functioning as a workpiece detection sensor, and the integrated with the movement distance or movement time in the conveyance direction A of the processed lumber W input from the encoder 5c of the conveyance unit 5 is surrounded by four surfaces including the defective portion We. Volume data is calculated (step S3).

  Subsequently, a volume determination step is performed by the control device 9. In this volume determination step, the volume data calculated based on the two-dimensional data of the two-dimensional displacement sensor is compared with a volume allowable range as a pass / fail determination criterion stored in advance, and based on the cross-sectional area of the processed lumber W. A pass / fail determination is made (step S4). In this acceptance / rejection determination, it is determined whether or not the calculated volume value falls below the lower limit value of the allowable range. Further, in order to determine the processed lumber W as a volume rejected product, at least one data of the width dimension L1 and the height dimension L2 continuously deviates from the allowable range in the longitudinal direction N of the processed lumber W. When the number of times exceeds the allowable range, the processed lumber W is determined as a volume rejected product.

  Subsequently, an addition determination step is performed by the control device 9. In this addition determination step, it is determined whether at least one of the width L1 dimension and the height L2 dimension in the two-dimensional data of the lumber product regarded as a volume acceptable product is within a preset allowable range. If it is not acceptable, the product is rejected (step S5). In addition, instead of the width dimension L1 and the height dimension L2, the concave width dimension L3 and the concave height dimension L4 may be the case of only the defective portion We. It is searched how many times the data of L1 and the height dimension L2 (or the concave width dimension L3 and the concave height dimension L4) deviated continuously from the allowable range in the longitudinal direction N of the processed lumber W. When the number of times exceeds the allowable range, the processed lumber W is determined as a rejected product.

  Thereafter, a post-processing step is performed by the control device 9. In this post-processing step, characters, figures, symbols, logos and the like, which are pass / fail indications, are printed at predetermined positions on the processed lumber W based on the pass / fail judgment result (see FIG. 7). Moreover, in step 6 of this example, when the concave volume of the defective portion We exceeds the reference volume data (fail), marking is performed (step 7 Yes), and the volume does not exceed the reference volume data (pass). Is not marked (step 7 No). Further, for example, a pass indication may be marked when passing, and a fail indication may be marked when failing.

  Thus, by measuring the cross-sectional shape, if there is a local defect portion We in the processed lumber W, the presence or absence can be reliably inspected. In addition, since the dimension of the defective portion We is measured, the measurement dimension can be used for the pass / fail judgment based on the size of the defective portion We, and inspection variations such as visual inspection do not occur, and the inspection quality is stabilized. In addition, since continuous inspection can be performed while conveying the presence or absence of defective parts We, it is possible to process faster than the inspection time of visual inspection by an operator, and it is possible to automate in conjunction with the speed-up of the molder machine 1 for production. Efficiency can be improved. In addition, since the defect portion We can be confirmed by volume, it is possible to distinguish the type of the defect portion We, for example, chipping, cracking and missing joint, and the pass / fail judgment can be subdivided, so that it matches the purpose of use of the processed lumber W. Thus, the degree of freedom of use of the processed lumber W after the inspection is widened, and it is rarely excluded that the processed lumber W cannot be used. Thus, it is possible to provide the outer shape inspection apparatus 2 capable of effectively using the processed lumber W. Moreover, since an artificial factor is not added to the pass / fail judgment of the processed lumber W, the inspection quality can be improved. Further, it is possible to increase the speed and automation from the cutting process by the molder machine 1 to the surface inspection. In addition, since it is possible to specify whether the product is a non-defective product or a defective product based on the pass / fail indication, it is possible to use them separately even if they are mixed in error.

  In addition, the ratio of the volume of the defective portion We to the entire volume of the processed lumber W in the volume calculation process is calculated and used for pass / fail determination, or only the addition determination is used for pass / fail determination. It is also possible to make a pass / fail judgment as a whole of the processed lumber W after using only a part of them, combining them, or changing the process order, for example, making a pass / fail judgment of only the defective portion We.

The conceptual diagram of the manufacturing line of the sawing goods provided with the external shape inspection apparatus of the sawing goods of this invention. The conceptual diagram of the arrangement | positioning relationship of the two-dimensional displacement sensor in the test | inspection part of an external shape inspection apparatus. The conceptual diagram of the measurement state of the defect part of the processing lumber by a two-dimensional displacement sensor. The schematic diagram of a structure of a two-dimensional displacement sensor. The figure which shows the two-dimensional data of the defect part of a process lumber. The conceptual diagram of the conveyance part etc. in an external form inspection apparatus. The figure which shows the provision state of the pass / fail indication to the processing lumber by a marking apparatus. The electrical block diagram of an external shape inspection apparatus. The schematic block diagram of a control apparatus. The inspection flow figure of an outline inspection measure.

Explanation of symbols

2 Outline inspection equipment 3a Sensor head (two-dimensional displacement sensor)
5 Conveying unit 6 Marking device 9 Control device W Processing sawn timber
We Defect L1 Width (Sawmill)
L2 Height dimension (sawmill product)
L3 concave width (defect)
L4 Concave height dimension (defect)
N Longitudinal direction

Claims (19)

A method for inspecting an outer shape of a lumber product to inspect whether the size and outer shape of the lumber product after being cut as a plate material or a square material are appropriate,
A two-dimensional data measurement step of continuously measuring the width and height of the sawn product in the longitudinal direction while moving the sawn product in the longitudinal direction;
Based on the integration of the cross-sectional area of the lumber product by the two-dimensional data and the travel distance or travel time of the lumber product, a volume calculation step for calculating the volume of the lumber product,
The calculated volume is compared with a preset allowable volume range, and if the calculated volume is within the allowable range, the lumber product is determined to be a volume acceptable product. A volume determination step to perform,
A method for inspecting the outer shape of a lumber product, comprising: The two-dimensional data measurement step includes continuously measuring in the longitudinal direction the concave width dimension and the concave height dimension of the concave defect portion present on the cut processed surface of the lumber product,
The volume calculation step includes calculating the volume of the defect portion based on the integration of the cross-sectional area of the defect portion based on the two-dimensional data and the movement distance or movement time of the lumber product,
In the volume determination step, the calculated volume of the defect portion is compared with a preset allowable range of the defect portion volume, and if the calculated volume of the defect portion is within the allowable range, the lumber product passes the volume. 2. The method for inspecting the appearance of a lumber product according to claim 1, further comprising determining that the product is a volume reject product if it is outside the allowable range.   In the said volume determination process, in order to determine the said lumber product as a volume acceptable product or a volume unacceptable product, it is determined by whether the calculated volume value is less than the lower limit of the said allowable range. A method for inspecting the outer shape of the lumber product as described in 1.   It is searched how many times at least one of the width dimension and the height dimension in the two-dimensional data or the concave width dimension and the concave height dimension deviates from the allowable range in the longitudinal direction of the lumber product, and The method for inspecting the appearance of a lumber product according to claim 1 or 2, wherein the lumber product is determined to be defective when the number of times exceeds an allowable range. A method for inspecting an outer shape of a lumber product to inspect whether the size and outer shape of the lumber product after being cut as a plate material or a square material are appropriate,
A two-dimensional data measurement step of continuously measuring the width and height of the sawn product in the longitudinal direction while moving the sawn product in the longitudinal direction;
Based on the integration of the cross-sectional area of the lumber product by the two-dimensional data and the travel distance or travel time of the lumber product, a volume calculation step for calculating the volume value of the lumber product,
The calculated volume is compared with a preset allowable volume range, and if the calculated volume value is within the allowable range, the lumber product is a volume acceptable product, and if it is outside the allowable range, A volume determination step for determining;
It is determined whether or not at least one of the width dimension and the height dimension in the two-dimensional data of the lumber product that has been passed the volume is within the preset allowable range. If it is not within the range, the additional judgment process to be a rejected product,
A method for inspecting the outer shape of a lumber product, comprising: The two-dimensional data measurement step includes continuously measuring in the longitudinal direction the concave width dimension and the concave height dimension of the concave defect portion present on the cut processed surface of the lumber product,
The volume calculating step includes calculating the volume of the defective portion based on an integration of a cross-sectional area of the defective portion based on two-dimensional data and a moving distance or moving time of the lumber product,
In the volume determination step, the calculated volume of the defect portion is compared with a preset allowable range of the defect portion volume, and if the calculated volume of the defect portion is within the allowable range, the lumber product passes the volume. 6. The method for inspecting the appearance of a lumber product according to claim 5, further comprising determining that the product is a volume reject product if it is outside the allowable range.   In the said volume determination process, in order to determine the said lumber product as a volume pass product or a volume reject product, it is determined by whether the calculated volume value is less than the lower limit of the said allowable range. A method for inspecting the outer shape of the lumber product as described in 1.   It is searched how many times at least one of the width dimension and the height dimension in the two-dimensional data or the concave width dimension and the concave height dimension deviates from the allowable range in the longitudinal direction of the lumber product, and The method for inspecting an outline of a lumber product according to claim 5 or 6, wherein when the number of times exceeds an allowable range, the lumber product is determined as a defective product.   For the lumber product determined to be a volume reject product or a reject product, a reject signal is output to the transport line and a predetermined fail process is performed, or the lumber product that is a volume pass product or a pass product. The outline inspection method for a lumber product according to any one of claims 1 to 8, further comprising a post-processing step of outputting a pass signal to the transfer line for a product and performing a predetermined pass process. An apparatus for inspecting the appearance of a lumber product that inspects whether the dimensions and the external shape of the lumber product after being machined as a plate material or a square material are appropriate,
A conveying line for moving the lumber product in the longitudinal direction;
A width dimension sensor and a height dimension that are provided in the conveyance line and continuously measure the width dimension and the height dimension of the lumber article in the longitudinal direction while moving the lumber article in the longitudinal direction on the conveyance line. A two-dimensional data measuring device including a sensor;
A transport condition measuring device for measuring a travel distance or a travel time of the lumber product in the transport line;
Volume calculation means for calculating the volume of the lumber product based on the integration of the cross-sectional area of the lumber product and the moving distance or moving time of the lumber product according to the two-dimensional data;
The calculated volume is compared with a preset allowable volume range, and if the calculated volume is within the allowable range, the lumber product is determined to be a volume acceptable product. Volume determining means to perform,
An apparatus for inspecting the shape of a lumber product. The two-dimensional data measuring device includes continuously measuring a concave width and a concave height of a concave defect existing on a cut surface of the lumber product in the longitudinal direction,
The volume calculating means includes calculating the volume of the defective portion based on an integration of a cross-sectional area of the defective portion based on two-dimensional data and a moving distance or moving time of the lumber product,
The volume determination means compares the calculated volume of the defect portion with a preset allowable range of the defect portion volume, and if the calculated volume of the defect portion is within the allowable range, the sawn product is acceptable. 11. The apparatus for inspecting the appearance of a lumber product according to claim 10, further comprising determining that the product is a volume reject product if the product is out of an allowable range.   The said volume determination means WHEREIN: In order to determine the said lumber product as a volume acceptance product or a volume unacceptable product, it is determined by whether the calculated volume value is less than the lower limit of the said allowable range. Equipment for inspecting lumber products as described in 1.   It is searched how many times at least one of the width dimension and the height dimension in the two-dimensional data or the concave width dimension and the concave height dimension deviates from the allowable range in the longitudinal direction of the lumber product, and The apparatus for inspecting an outline of a lumber product according to claim 10 or 11, wherein the lumber product is determined to be defective when the number of times exceeds an allowable range. An apparatus for inspecting the appearance of a lumber product that inspects whether the dimensions and the external shape of the lumber product after being machined as a plate material or a square material are appropriate,
A conveying line for moving the lumber product in the longitudinal direction;
A width dimension sensor and a height dimension that are provided in the conveyance line and continuously measure the width dimension and the height dimension of the lumber article in the longitudinal direction while moving the lumber article in the longitudinal direction on the conveyance line. A two-dimensional data measuring device including a sensor;
A transport condition measuring device for measuring a travel distance or a travel time of the lumber product in the transport line;
Volume calculation means for calculating the volume value of the lumber product based on the integration of the cross-sectional area of the lumber product and the travel distance or travel time of the lumber product from the two-dimensional data;
The calculated volume is compared with a preset allowable volume range, and if the calculated volume value is within the allowable range, the lumber product is a volume acceptable product, and if it is outside the allowable range, Volume determining means for determining;
It is determined whether at least one of the width dimension and the height dimension in the two-dimensional data in the lumber product that has been passed the volume is within a preset allowable range. If it is not, the additional judgment means to be a rejected product,
An apparatus for inspecting the shape of a lumber product. The two-dimensional data measuring device includes continuously measuring a concave width and a concave height of a concave defect existing on a cut surface of the lumber product in the longitudinal direction,
The volume calculating means includes calculating the volume of the defective portion based on an integration of a cross-sectional area of the defective portion based on two-dimensional data and a moving distance or moving time of the lumber product,
The volume determination means compares the calculated volume of the defect portion with a preset allowable range of the defect portion volume, and if the calculated volume of the defect portion is within the allowable range, the sawn product is acceptable. 15. The apparatus for inspecting the appearance of a lumber product according to claim 14, further comprising determining that the product is a volume reject product if it is out of an allowable range.   In the said volume determination means, in order to determine the said lumber product as a volume acceptable product or a volume unacceptable product, it is determined by whether the calculated volume value is less than the lower limit of the said allowable range. Equipment for inspecting lumber products as described in 1.   It is searched how many times at least one of the width dimension and the height dimension in the two-dimensional data or the concave width dimension and the concave height dimension deviates from the allowable range in the longitudinal direction of the lumber product, and The sawing product outer shape inspection apparatus according to claim 14 or 15, wherein when the number of times exceeds an allowable range, the sawing product is determined as a defective product.   For the lumber product determined to be a volume reject product or a reject product, a reject signal is output to the transport line and a predetermined fail process is performed, or the lumber product that is a volume pass product or a pass product. 18. An apparatus for inspecting a lumber product according to any one of claims 9 to 17, further comprising a signal output means for outputting a pass signal to the transfer line and performing a predetermined pass process for the product.   The conveyance line is provided with a workpiece detection sensor for detecting that the leading edge of the lumber product to be conveyed has passed and the trailing edge has passed, and the lumber to be inspected by a signal of the workpiece detection sensor. 19. The apparatus for inspecting a lumber product according to any one of claims 10 to 18, wherein a moving distance or moving time of the product can be obtained.

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