JPH0624947U - Paper ejection guide rollers for video printers - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a compact guide roller that can prevent paper jam of cut sheets when ejecting paper from a video printer and is compact. [Structure] When removing the cut sheet, when the rubber roller rotates, the chucking part tries to push the cut sheet into the discharge path, but the friction between the leading edge of the cut sheet and the discharge path is generated. I try to peel the cut paper from the rubber roller because of the force. In order to prevent the cut sheet from being peeled off from the rubber roller against the above force, a paper ejection guide roller is provided at the outer peripheral portion of the rubber roller at the entrance of the paper ejection path.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper ejection guide roller for a video printer.

[0002]

[Prior art]

 Conventionally, when printing with a type that uses cut paper for printing with a sublimation type thermal transfer color video printer, the cut paper is wrapped around a rubber roller and an ink ribbon coated with a sublimation ink is applied to the print head. Sublimate by heating and transfer to cut paper. The ribbon is coated with three primary colors, which are overlaid to reproduce multiple colors. The three primary colors are transferred in sequence, but if the cut paper is misaligned around the platen roller during each color change, color misregistration occurs between the three primary colors, which causes deterioration of print quality. In order to solve the above problem, there was a method of holding the cut paper 33 in the chucking groove 31 of the platen roller as shown in FIG. However, in the above method, when the platen roller is reversed and the paper is ejected, the cut paper is loosened from the platen roller and separated, and even a slight resistance between the edge of the cut paper and the paper ejection path causes the cut paper to indicate 35. Since it had the drawback that it was peeled off from the platen roller in such a form and could not be discharged to the outside, in order to eliminate the above-mentioned drawbacks, as shown in Fig. 2, a guide of cut paper was provided around the platen roller. Was installed to prevent the paper from jamming by preventing the cut paper from being separated from the platen roller. In FIG. 2, 21 is a paper discharge path, 22 is the rotation direction of the platen roller at the time of paper discharge, 23 is cut paper, and 24 is a platen roller.

[0003]

[Problems to be solved by the device]

 As described above, when the conventional platen roller is reversed and the paper is ejected, the cut paper is loosened from the platen roller and separated from the platen roller by the slight resistance between the edge of the cut paper and the paper ejection path. It had the drawback of being peeled off and not being discharged to the outside. In order to solve the above problems, a guide for cut paper is provided around the platen roller to prevent the cut paper from separating from the platen roller and prevent paper jams. It is necessary to provide the device, which restricts the placement of other parts to that extent, reduces the degree of freedom in design, and makes it difficult to downsize the device.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has a platen roller having a chucking portion for holding and fixing the printing paper, and a platen roller for winding the printing paper on the surface, and the platen roller being reversed. A paper ejection guide for ejecting the photographic paper is arranged, and a guide roller for pressing the photographic paper toward the platen roller is provided in the vicinity of the paper ejection guide.

[0005]

[Action]

 According to the present invention, when the cut sheet is taken out, the platen roller rotates so that the chucking section and the leading edge of the cut sheet eject when the cut sheet tries to push the cut sheet into the discharge path. Even if the cut sheet is peeled off from the platen roller due to the frictional force with the paper path, the cut sheet is pushed out because the cut guide sheet and the platen roller pinch the cut sheet.

[0006]

【Example】

 An embodiment of a discharge guide roller of a video printer according to the present invention will be described in detail below with reference to the drawings. As shown in the embodiment of FIG. 1, when the platen roller rotates in the direction of arrow 2 when the cut sheet is taken out, the chucking unit 4 tries to push the cut sheet into the discharge path 1. , The distance between the chucking part and the paper discharge path is long, and there is nothing that winds the cut paper around the platen roller during that time, so the frictional force between the tip of the cut paper and the paper discharge path is reduced. Therefore, the cut paper may come off from the platen roller. In order to prevent the platen roller from peeling the cut sheet against the frictional force, the discharge guide roller 5 is provided at the outer peripheral portion of the platen roller and in the vicinity of the discharge path. The distance between the guide roller 5 and the guide roller 5 is shortened as much as possible to reduce the deflection of the cut sheet, and the cut sheet is scissored by the discharge guide roller and the platen roller so that the gap between the leading edge of the cut sheet and the discharge path can be reduced. Overcome the frictional force of and push the cut paper out. With the above-described structure, the distance between the guide roller and the entrance of the sheet discharge path is short, so that the stiffness of the cut sheet is increased and the force against the frictional force is increased. Further, since the guide roller does not transmit the frictional force to the chucking portion side, the force for peeling the cut sheet from the platen roller is reduced.

[0007]

[Effect of device]

 As described above, according to the paper ejection guide roller of the video printer of the present invention, the above-mentioned paper ejection guide is not necessary at the time of paper ejection, and the paper ejection guide device can be downsized.

[Brief description of drawings]

FIG. 1 is a diagram of a paper ejection guide roller of a video printer according to the present invention.

FIG. 2 is a diagram for preventing jamming of a cut sheet by a conventional sheet discharge guide.

FIG. 3 is a diagram of a paper jam of a conventional video printer.

[Explanation of symbols]

 1 Ejection path 2 Roller rotation direction 3 Roller 4 Step difference in chucking 5 Ejection guide roller

Claims (2)

[Scope of utility model registration request] 1. A platen roller having a chucking portion for holding and fixing the printing paper, and a platen roller around which the printing paper is wound, and the platen roller are reversed to eject the printing paper. A paper ejection guide roller for a video printer, wherein a paper ejection guide for paper is arranged, and a guide roller for pressing the printing paper toward the platen roller is provided in the vicinity of the paper ejection guide. 2. A paper discharge guide roller for a video printer according to claim 1, wherein the guide roller is separated from the platen roller during printing.