Sheet processing apparatus and image forming apparatus

Abstract

To provide a sheet processing device capable of processing a sheet into a bag without using consumables such as an adhesive.SOLUTION: There is provided a sheet processing device that comprises: sheet folding means for folding a sheet while conveying the sheet so that a front end and a rear end of the sheet overlap in a conveyance direction at a time of start of conveyance; first binding means for binding an overlapped portion of the front end and the rear end of the folded sheet folded by the sheet folding means; and second binding means for binding one of the ends of the folded sheet in a direction of the folding.SELECTED DRAWING: Figure 1

Claims

1. A sheet processing apparatus for processing sheets into bags, A sheet folding means that folds the sheet while it is being transported, so that the leading edge and trailing edge of the sheet overlap in the transport direction at the start of transport, A first binding means for binding the overlapping portions of the leading edge and the trailing edge of the folded sheet folded by the aforementioned sheet folding means, The folding sheet comprises a second fastening means for fastening one end of the folding sheet in the direction of the fold, The aforementioned sheet folding means is It has multiple roller groups, each consisting of several roller members. The rotation direction of each roller member is controlled to form the folded sheet in a rolled, tri-folded shape. A sheet processing apparatus characterized by the following:

2. The sheet processing apparatus according to claim 1, which processes the sheet into a pillow bag.

3. The first fastening means is, The sheet folding means comprises a first roller pair consisting of the roller member located at the downstream end, and a second roller pair located at an opposing position downstream of the first roller pair. The sheet processing apparatus according to claim 1, further comprising a first binding mechanism disposed between the first pair of rollers and the second pair of rollers.

4. A sheet processing apparatus for processing a sheet into a bag, A sheet folding means that folds the sheet while it is being transported, so that the leading edge and trailing edge of the sheet overlap in the transport direction at the start of transport, A first binding means for binding the overlapping portions of the leading edge and the trailing edge of the folded sheet folded by the aforementioned sheet folding means, The folding sheet comprises a second fastening means for fastening one end of the folding sheet in the direction of the fold, The first fastening means is, The sheet folding means comprises a first roller pair consisting of the roller member located at the downstream end, and a second roller pair located at an opposing position downstream of the first roller pair. The system comprises a first binding mechanism positioned between the first pair of rollers and the second pair of rollers, When the overlapping portion reaches the space between the first pair of rollers and the second pair of rollers, By keeping the rotation direction of the first pair of rollers the same as before and reversing the rotation direction of the second pair of rollers, the overlapping portion is brought into a gaiter state and guided to the first binding mechanism. The first binding mechanism fastens by pressing together the overlapping portions in the gaiter state. A sheet processing apparatus characterized by the following:

5. The sheet processing apparatus according to claim 4, wherein the first binding mechanism comprises rotary crimping teeth that move in the width direction of the folded sheet while gripping the overlapping portion to bind it.

6. The sheet processing apparatus according to claim 4, wherein the first binding mechanism is equipped with crimping teeth that move at predetermined intervals in the width direction of the folded sheet and clamp the overlapping portions at predetermined intervals to bind them together.

7. The sheet processing apparatus according to claim 1, wherein the second binding means comprises a second binding mechanism that binds one end of the folded sheet while moving relative to the transport direction of the folded sheet.

8. A sheet processing apparatus for processing a sheet into a bag, A sheet folding means that folds the sheet while it is being transported, so that the leading edge and trailing edge of the sheet overlap in the transport direction at the start of transport, A first binding means for binding the overlapping portions of the leading edge and the trailing edge of the folded sheet folded by the aforementioned sheet folding means, The folding sheet comprises a second fastening means for fastening one end of the folding sheet in the direction of the fold, The second binding means includes a second binding mechanism that binds one end of the folded sheet while moving relative to the transport direction of the folded sheet, The second binding mechanism includes crimping teeth that clamp and bind one end of the folded sheet at predetermined intervals as the folded sheet moves in the transport direction. A sheet processing apparatus characterized by the following:

9. The sheet processing apparatus according to claim 8, wherein the second binding mechanism includes rotary crimping teeth that grip and bind one end of the folded sheet as it moves in the transport direction.

10. Image forming means for forming an image on a sheet being transported, The system includes a sheet processing means that folds the sheet on which the image has been formed while it is being transported to produce a bag, The image forming apparatus is characterized in that the sheet processing means is a sheet processing apparatus according to any one of claims 1, 4, or 8.

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