JPS6130802Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for detecting and punching out defects such as resin lines after dyeing a raw veneer. a television camera 2 for scanning the top of the raw veneer 1 and converting the color of the raw veneer 1 into black and white shading information; a punching device 3 for punching out the resin lines in the raw veneer 1; It consists of a calculator 4 that memorizes the shading level of areas other than the streaks, detects the position of the streaks based on the shading information input from the television camera 2, and operates the punching device 3 at that position. This invention relates to a defect removal device for raw veneer.

Conventionally, a laser beam is applied to a continuously flowing raw veneer, and the reflected light of the laser beam is captured to determine whether it is a resinous part or not. It was hot. However, with this method, it is necessary to set the reflection angle, and since the reflection angle changes depending on the warpage of the bare veneer, the warpage of the bare veneer is a weak point, making it difficult to handle.

The present invention was developed in view of the drawbacks of the conventional example described above, and its purpose is to be able to automatically detect the resinous part and remove it by punching out the part, and yet to overcome the drawbacks of the conventional example. To provide an apparatus for removing defects from a raw veneer which does not require setting of reflection angle and is easy to handle.

The present invention will be explained in detail below with reference to the accompanying drawings. This invention uses a batch process to process each raw veneer one by one.
It consists of a television camera 2, a calculator 4, and a punching device 3.
When dyeing raw veneer 1 sliced from coniferous wood such as agathis, there is always a difference in color between the part without resin (resin) and the part with resin (the part with resin is not dyed). Hateful.). The television camera 2 scans over the bare veneer 1 and converts the difference in color of the bare veneer 1 into black and white shading information (brightness information). When the color of the raw veneer 1 is converted into black and white shading information in this way, the raw veneer 1 dyed in the spring wood color will have the following information: The left side is the dark direction.) shows the frequency distribution of shading levels (brightness levels) as shown in Figure 2. The frequency distribution curve α of the shading levels of the rays is the frequency distribution curve α of the shading levels of the areas other than the rays. It is shifted toward the darker side than the frequency distribution curve β. Further, when the raw veneer 1 is dyed in a dark color such as autumn wood color, the frequency distribution curve of the resinous portion is shifted toward the brighter side than the frequency distribution curve of the non-porous portion. Reference numeral 4 is a computer with a large storage capacity and an auxiliary storage device, and it is able to store the frequency distribution of the density levels of the resin-stripe parts and non-reinforced parts of the above-mentioned dyed raw veneer as a frequency distribution table. ing.
Reference numeral 3 denotes a punching device, which punches holes of appropriate size in the raw veneer 1, and is controlled to move freely over the raw veneer 1. The black and white shading information converted by the television camera 2 is then input to the computer 4, and the computer 4 determines whether the shading level is that of the yin-yin part based on the stored frequency distribution table. A logical judgment is made as to whether the part is in a part other than the part, and based on this judgment, the position of the part is detected. ). The punching device 3 uses the position of the muscle in this resin as the coordinates X and Y.
The punching device 3 moves to the coordinates X and Y and punches out the resinous portion from the raw veneer 1.

What is shown in FIGS. 3a to 3i is the manufacturing process of laminated wood, in which logs 5 of coniferous trees such as agathis are sliced with a rotary lace (FIG. 3a), and this rotary veneer 6 is cut into appropriate dimensions. to form a bare veneer 1, and dye the bare veneer 1 in a dyeing tank 7 (Fig. 3b) to form a dyed bare veneer 1 (see Figure 3b).
Figure c). In this way, the raw veneer 1 is dyed in the spring wood color of wood to become the spring wood portion 8a. At this stage, the dyed raw veneer 1 is punched out and removed by the aforementioned defect removing device. The punched holes in the raw veneer 1 may be filled with wood. The raw veneer 1 from which the resinous streaks have been removed is glued and laminated with paper 10 colored in the autumn wood color using a laminator 9 (Fig. 3 d), and many of these are stacked to form the raw veneer. 1 spring material part 8a
and the autumn wood part 8b of the paper 10 are stacked alternately (Fig. 3e), and pressed by sandwiching the template 11 from above and below (Fig. 3f), so that the spring wood part 8a and the autumn wood part 8b are mutually stacked. They are glued together to form a wavy, curved fritch assembly 12. Here, as the autumn wood portion 8b of the laminated fritsch 12, a raw veneer 1 which has been dyed in the color of autumn wood and whose sinews have been removed may be used. Next, this assembled fritsch 12 is sliced (FIG. 3g) to form a sliced veneer 13, and the sliced veneer 13 is bonded to the surface of the base plywood 14 to form an overlay plywood 15 (FIG. 3h). , a coating roll 16 is applied to the surface of the sliced veneer 13.
Then, finish by painting with varnish etc. (Fig. 3i).

As described above, the present invention consists of a television camera that scans the dyed raw veneer and converts the raw veneer into black and white gradation information, and a television camera that scans the dyed raw veneer and converts the raw veneer into black and white shading information, and The machine memorizes the shading level of the resin, detects the position of the resin part based on the density information input from the television camera, and operates the punching device at that position.The machine automatically cuts the resin part. It is possible to detect and punch out the resin streaks, and since it uses a television camera as the terminal device for detection and does not capture reflected light and detect it like the conventional example, it is not as easy as the conventional example. It has the advantage that it does not require setting the reflection angle and is easy to handle. Furthermore, since a television camera is used, the detection method approximates human vision, and by moving the television camera closer or further away from the bare veneer, the precision of the resolution of the television camera changes. The advantage is that the detection accuracy can be easily adjusted to match the human reaction to the sinews, such as when you move a certain distance away from the veneer, you don't notice the sinews, and as you get closer, you start to notice them. be.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention;
FIG. 2 is a frequency distribution curve of the density level of the veneer and non-veneer portions, and FIG. 3 a to i are diagrams of the manufacturing process of the laminated wood. 1... Plain veneer, 2... Television camera, 3... Punching device, 4... Calculator.

Claims (1)

[Scope of utility model registration request] A television camera that scans the dyed raw veneer and converts the color of the raw veneer into black and white shading information, a punching device that punches out the resin lines in the raw veneer, and resin. This element consists of a computer that memorizes the shading levels of the streaks and non-stripe areas, detects the position of the streaks based on the shading information input from the television camera, and operates the punching device at that position. Veneer defect removal device.