PROBLEM TO BE SOLVED: To provide a sheet holding spring capable of reducing cost, ensuring sheet holding force, removing risk at end cut part and improving working efficiency.SOLUTION: Sheet damage preventing function is enhanced by providing a wavelike uneven pattern in which bilateral symmetry approximately trapezoid is continuously turned over, reducing load on a hand upon inserting it, and obliquely cutting an end cut part 10. In addition, spring 1 made of hard steel wire of 2 mm in wire diameter and 2 m in entire length encompasses 16 pieces of full length units 11 and 1/4 length units 12 at both end. Furthermore, the height of hill parts 5 is designed at 36.5 mm and straight part of the hill parts 5 is designed at 33 mm. Thereby, the sheet holding spring has about 500 kg of sheet holding force equivalent to a conventional one in which hard steel wire of 2.3 mm in wire diameter is used and the weight of it is reduced than the product.【課題】コストダウンと同時にシート保持力の確保、端末カット部の危険性除去、作業効率の改善ができるシート止めスプリングを提供する。【解決手段】左右対称の略台形が反転して連続する波型凹凸にして、挿入時の手への負荷を軽減し、端末カット部１０を斜めにカットすることでシート破損防止機能を高めてなる。又、線径２ｍｍの硬鋼線を用いたもので、全長２ｍの長さのスプリングに１ユニット１１を１６個と両端の４分の１のユニット１２の長さのものを収め、しかも山部５の高さを３６．５ｍｍ、山部５の直線部が３３ｍｍに設定されてなり、これにより従来の線径２．３ｍｍの硬鋼線を用いたものと同等のシート保持力約５００ｋｇを有し、かつ前記製品より重量を低減させてなる。【選択図】図７
