An object of the present invention is to provide a sheet winder for a greenhouse which is easy to wind and unwind a sheet without requiring skill by improving the operability of the handle and is suitable for low-cost mass production. An input shaft 6 protrudes from one side of left and right frames 5 and 5 having a transmission unit 40 with a built-in brake, an output shaft 7 projects from the other, one end of a handle 2 is attached to the input shaft, and a seat is attached to the output shaft. 3 winding pipe 4 is attached. A rotating roller 8 that rolls in contact with the guide column 1 is supported in the frame 5, and a drive-side first gear group 10 including a main gear and a sub-gear is provided on the input shaft 6 side frame, A frame 30 containing a transmission gear device A composed of a second gear group 20 on the driven side composed of a slave gear is fixed. [Selection] Figure 1【課題】ハンドルの操作性を向上させて熟練を要さずにシートの巻取り・巻戻しが楽にでき、安価量産に好適する温室のシート巻取り装置を提供する。【解決手段】ブレーキ内蔵の伝動部４０を備えた左右のフレーム５・５の片側に入力軸６、他方に出力軸７を突設し、入力軸にハンドル２の一端を取り付けるとともに出力軸にシート３の巻取りパイプ４を取り付ける。フレーム５内に、ガイド支柱１に接して転動する回転ローラ８を軸支し、入力軸６側のフレームに、主ギアと従ギアからなる駆動側の第一ギア群１０と、主ギアと従ギアからなる被動側の第二ギア群２０からなる変速ギア装置Ａを内包した枠体３０を固着する。【選択図】図１
