MARKING SEAL FOR HOLE CUTTING

PROBLEM TO BE SOLVED: To improve accuracy of a through-hole, when making a through-hole by cutting a plate with a jigsaw, by enabling a saw blade of the jigsaw to be guided as closely along a marking circle as possible.SOLUTION: A marking seal for hole cutting comprises: a display sheet 21 with a ma...

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1. Verfasser: ABE TATSURO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To improve accuracy of a through-hole, when making a through-hole by cutting a plate with a jigsaw, by enabling a saw blade of the jigsaw to be guided as closely along a marking circle as possible.SOLUTION: A marking seal for hole cutting comprises: a display sheet 21 with a marking circle 20, printed on a surface thereof, corresponding to an ideal circle E with an ideal size of a through-hole 2 to be opened in a plate 1; and an adhesive layer 22 capable of temporarily adhering to the plate 1. An inner limit line 30 which is surrounded by the marking circle 20 and regulates an inner tolerance with respect to the ideal circle E of the through-hole 2 to be cut out along the marking circle 20, and an outer limit line 31 which surrounds the marking circle 20 and regulates an outer tolerance with respect to the ideal circle E of the through-hole 2 to be cut out along the marking circle 20, are displayed on the surface of the display sheet 21. Also, a first small circle 40 and a second small circle 41, for cutting smaller holes than the marking circle 20, are displayed to overlap with the marking circle 20.SELECTED DRAWING: Figure 1 【課題】 貫通孔をジグソーで切断して形成する場合に、ジグソーの鋸刃を罫書円からできるだけずれないように罫書円に沿って導くことができるようにし、貫通孔の精度の向上を図る。【解決手段】 板材1に開けられる貫通孔2の理想の大きさの理想円Eに対応した罫書円20を表面に表示した表示シート21と、板材1に仮着可能な粘着層22とを備え、表示シート21の表面に、罫書円20に囲繞され、罫書円20に倣って開けられる貫通孔2の理想円Eに対する内側のずれの許容範囲を規定する内限界ライン30を表示するとともに、罫書円20を囲繞し、罫書円20に倣って開けられる貫通孔2の理想円Eに対する外側のずれの許容範囲を規定する外限界ライン31を表示した。また、罫書円20より小さい小孔用の第1小孔円40及び第2小孔円41を罫書円20と重合するように表示した。【選択図】図1