日本木工機械展2023　出展者情報

合板生産の最終段階での検査であり、市場での製品評価に直結します。作業者は表裏(2面)、木口(4面)の検査を毎分約30枚(2秒に1枚)を行うため、疲労が激しく交代しながら検査を実施しています。人手不足の中、作業経験、検査技術を持つ人材の確保も喫緊の課題です。
　JAS規格改定(R5年1月19日施行)にて「全面検査機によって材面の品質検査を行う場合にあって、当該機器が製品の材面の品質検査担当者による検査と同等の性能を有するときは、この限りでない」との改正が実施された事で合板検査装置へのニーズが高まりました。
検査技術として下記の２点が開発・発明（特許出願中）の主な新技術です。
①表裏検査の時の反射光照明(単板に対し略垂直光)画像と斜光照明画像を同期、合成、比較する事で検出精度を向上させる技術。
②木口検査では単板厚み２～３ｍｍ程度のものを検出する為、軽微な反り、アバレ、コンベヤによる振動でも不具合が発生する為、カメラで読み込んだ画像を補正、平坦にしてから心板不足、心板重なり等を検出する補正技術。
是非、展示機をご覧ください。

This device inspects the final stage of plywood production and is directly related to product evaluation in the market. In general, operators inspect the front and back (2 sides) and the wood edge (4 sides) at a rate of about 30 sheets per minute (1 sheet every 2 seconds), which is very tiring and requires them to take turns while performing inspections. In the midst of labor shortages, securing personnel with experience and inspection skills is also an urgent issue.
　The revision of the JAS standard (enforced on January 19, 2023), which states, "When quality inspection is conducted on the face of lumber by a full-surface inspection machine, this shall not apply if the machine has the same performance as an inspection by a person in charge of quality inspection of the face of the product", has increased the need for plywood inspection device.
Two main new inspection technologies have been developed and invented (patents pending) as follows;
(1) Technology to improve detection accuracy by synchronizing, combining, and comparing reflected light illumination (light perpendicular to the veneer) and oblique light illumination images during front and back inspection.
(2) Correction technology that corrects and flattens images read by a camera and then detects missing short grains, overlapping short grains, etc., since the wood edge inspection detects veneers with a thickness of 2 to 3 mm, even minor warping, deformation, or vibration caused by conveyors can cause defects.
Please come and see our exhibit machine.